MobileRead Forums https://www.mobileread.com/forums/ MobileRead - the resource for mobile geeks seeking information and advice for keeping their gadgets happy. en Tue, 15 Sep 2026 10:09:59 GMT vBulletin 30 https://www2.mobileread.com/i/mr/misc/logo.gif MobileRead Forums https://www.mobileread.com/forums/ I am having a problem with Koreader and Pocketbook Verse https://www.mobileread.com/forums/showthread.php?t=375322&goto=newpost Tue, 15 Sep 2026 06:28:42 GMT I am not understanding why not all of my books folders are showing up in Koreader https://share.icloud.com/photos/0f7PmZJZQB3fqmTjb7tzEbvUghttps://share.icloud.com/photos/0da2_9OH1_2HbVDddmqB1moRA I am not understanding why not all of my books folders are showing up in Koreader
https://share.icloud.com/photos/0f7P...fqmTjb7tzEbvUghttps://share.icloud.com/photos/0da2...HbVDddmqB1moRA ]]> KOReader Rouge One https://www.mobileread.com/forums/showthread.php?t=375322 How to Download Firmware from Boox https://www.mobileread.com/forums/showthread.php?t=375321&goto=newpost Tue, 15 Sep 2026 03:31:42 GMT I'm stuck downloading the Boox Firmware upx files. How do I create a download link?

it looks like I can get informations like finger etc with simple adb commands.

adb shell getprop ro.product.model
adb shell getprop ro.product.device
adb shell getprop ro.build.fingerprint
adb shell getprop ro.build.display.id
adb shell getprop ro.build.version.incremental

I found this for the Go 7 Color:
http://data.onyx-international.cn/api/firmware/update?where={%22buildNumber%22:0,%22buildType%22: %22user%22,%22deviceMAC%22:%22%22,%22lang%22:%22en _US%22,%22model%22:%22GoColor7%22,%22submodel%22:% 22%22,%22fingerprint%22:%20%22Onyx/GoColor7/GoColor%22}

But I have a Boox Tab Ultra C and I didn't get it to work yet. :help: ]]> Onyx Boox Stefan1985 https://www.mobileread.com/forums/showthread.php?t=375321 <![CDATA[Find & Replace]]> https://www.mobileread.com/forums/showthread.php?t=375319&goto=newpost Mon, 14 Sep 2026 22:13:25 GMT See the big cat

and I want to just replace 'big' with 'large' but only in the text

See the large cat

How to do it? It'd be nice if there was a F&R checkbox to "Ignore in tags"]]> I got some ideas in my earlier post

https://www.mobileread.com/forums/sh...highlight=tags

but I can't figure out if it's possible to ignore a 'Find' if it's inside a tag(s)

Say for example i have

<p class="big black">See the big cat</p>

and I want to just replace 'big' with 'large' but only in the text

<p class="big black">See the large cat</p>

How to do it?

It'd be nice if there was a F&R checkbox to "Ignore in tags" ]]> Editor phossler https://www.mobileread.com/forums/showthread.php?t=375319 help on python replace function needed https://www.mobileread.com/forums/showthread.php?t=375318&goto=newpost Mon, 14 Sep 2026 20:23:50 GMT in the contained the book title rather than the Chapter title. I made a regex Find which selected the first few lines : Code: --------- (?is)(]*>).*?()(.*?]*>(?:\s*<[^>]+>\s*)*([^<].+?)\s*) where: \1 = \2 = \3 = everything after up to and including \4 = the chapter title --------- This worked fine because the chapter structure was consistent throughout the book. But then it occurred to me that it might be an opportunity to try a python function replace. I'm not a code writer let alone a python coder. So I took inspiration from the examples included in Sigil although I couldn't get the capitalize example function to work (lowercase, titlecase and uppercase were ok). I arrived at the following: Code: --------- def replace(match, number, file_name, metadata, dictionaries, data, functions, *args, **kwargs): title_open = match[1] title_close = match[2] between = match[3] chapter_title = match[4].strip() return title_open + chapter_title + title_close + between --------- This did not work, which was not really a surprise to me, but it intrigues me not to understand why. The full regex Find/Replace works fine, but I'm sure it would be helpful to understand more about python function replace. I don't find anything in the latest downloadable user guide and what is in the online version doesn't help me, sadly. Where did I go wrong, and any recommendations for a useful, simple and easy text on the subject?]]> Converting an epub2 to epub3, I found that another thing needing fixing was that the <title> in the <head> contained the book title rather than the Chapter title.

I made a regex Find which selected the first few lines :
Code:
(?is)(<title\b[^>]*>).*?(</title>)(.*?<h1\b[^>]*>(?:\s*<[^>]+>\s*)*([^<].+?)\s*</a></h1>)

where:
\1 = <title>
\2 = </title>
\3 = everything after </title> up to and including </h1>
\4 = the chapter title
This worked fine because the chapter structure was consistent throughout the book. But then it occurred to me that it might be an opportunity to try a python function replace. I'm not a code writer let alone a python coder. So I took inspiration from the examples included in Sigil although I couldn't get the capitalize example function to work (lowercase, titlecase and uppercase were ok). I arrived at the following:
Code:
def replace(match, number, file_name, metadata, dictionaries, data, functions, *args, **kwargs):
    title_open = match[1]
    title_close = match[2]
    between = match[3]
    chapter_title = match[4].strip()

    return title_open + chapter_title + title_close + between
This did not work, which was not really a surprise to me, but it intrigues me not to understand why.

The full regex Find/Replace works fine, but I'm sure it would be helpful to understand more about python function replace. I don't find anything in the latest downloadable user guide and what is in the online version doesn't help me, sadly.

Where did I go wrong, and any recommendations for a useful, simple and easy text on the subject? ]]> Sigil philja https://www.mobileread.com/forums/showthread.php?t=375318 Downgrading Note Air 3C - need custom recovery https://www.mobileread.com/forums/showthread.php?t=375317&goto=newpost Mon, 14 Sep 2026 16:21:20 GMT Hi, I’m trying to downgrade my Note Air 3C from firmware 4.2 to 3.5.4. I’ve already made a full EDL backup. Because of the anti-rollback protection I need a custom recovery that can install the older update.zip. Does anyone (especially @Renate) have a working custom recovery image for the Note Air 3C that I can flash via EDL? Thanks in advance! Hi,
I’m trying to downgrade my Note Air 3C from firmware 4.2 to 3.5.4. I’ve already made a full EDL backup.
Because of the anti-rollback protection I need a custom recovery that can install the older update.zip.
Does anyone (especially @Renate) have a working custom recovery image for the Note Air 3C that I can flash via EDL?
Thanks in advance! ]]> Onyx Boox z4yn https://www.mobileread.com/forums/showthread.php?t=375317 <![CDATA[Can't center images]]> https://www.mobileread.com/forums/showthread.php?t=375316&goto=newpost Mon, 14 Sep 2026 16:12:19 GMT I'm constantly having problems where images in epub files claim to be centred in the file, but don't display as centred on my Kobo (or in Adobe Digital Editions).

Example attached. What am I missing? Why does the image display as centred in Calibre editor + viewer, but not on my Kobo? And how do I fix it?
Attached Files
File Type: epub The Poisoned King_bestiary title page.epub (544.4 KB)
]]> ePub Siavahda https://www.mobileread.com/forums/showthread.php?t=375316 Hello there https://www.mobileread.com/forums/showthread.php?t=375315&goto=newpost Mon, 14 Sep 2026 08:32:44 GMT Hi there. I'm here mostly because I like ereaders and this site has good information on them. I have 3 ereaders, a Kobo Libra Color, a Kindle Paperwhite 12th gen signature edition, and an XTEINK x4.

I'm a bit of a snob when it comes to reading. I'm one of those people who despises audiobooks and any app on an ereader that isn't related to reading. It doesn't mean I think audiobooks are bad I just have no interest in an audiobook unless it is narrated by its author. Also the idea of games or web browsers on an ereader really puts me off... I feel like if they detract from reading.

I'm the type of reader who reads multiple books at a time, a chapter a day from about three or four books. My favorite thing is that point where a book really hooks me and it just completely monopolizes my reading time until it is done. The last book to do that for me was the Getaway by Jim Thompson. The current books I have spinning are Eisenhorn by Dan Abnett, In Cold Blood by Truman Capote, Blood Meridian by Cormack Mcarthy, Dungeon Crawler Carl by Matt Dinniman, and James by Perceval Everett.

Uhhhh... what else... oh, my favorite font is Adobe Garamond Pro but I've been dabbling in Literata alot recently and considering making the switch. ]]> Introduce Yourself Mattson https://www.mobileread.com/forums/showthread.php?t=375315 <![CDATA[Mystery and Crime Lowndes, Marie Belloc: Herculean Labours [Det.Hercules Popeau]. v1. 13 Sep 2026]]> https://www.mobileread.com/forums/showthread.php?t=375314&goto=newpost Mon, 14 Sep 2026 03:11:09 GMT
A small collection of short stories featuring Detective Hercules Popeau. My own compilation.

Popeau Intervenes
At a glamorous hotel on the French Riviera, former Sûreté detective Hercules Popeau uncovers a dangerous romantic intrigue: Lord Waverton is infatuated with glamorous Russian émigrée Countess Filenska, and they harbor a secret desire to be rid of the lovely Lady Waverton.

A Race for Life
When heir-apparent Jack Brantwood is mistakenly presumed dead due to long absence, his wastrel cousin Arthur borrows against the property. Jack’s wife desperately enlists the aid of Hercules Popeau — she is certain the unscrupulous money-lenders will murder Jack in order to protect their investment.

A Labour of Hercules
Popeau overhears a distressed young woman shouting for help in English from behind a locked hotel room door, but management and staff try to brush off the incident. Trusting his sharp intuition, he launches an unsanctioned investigation.

================
Marie Adelaide Elizabeth Rayner Lowndes (née Belloc; 5 August 1868 – 14 November 1947) was an English novelist, and sister of author Hilaire Belloc. Active from 1898 until her death, she had a literary reputation for combining exciting incident with psychological suspense. Her most famous novel, The Lodger (1913), based on the Jack the Ripper murders of 1888, has been adapted for the screen five different times.

She produced over forty novels in all — mainly mysteries, and occasionally based on real-life crimes, though she herself resented being classed as a crime writer. She created the French detective Hercules Popeau, possibly before Agatha Christie’s creation of Belgian detective Hercule Poirot; this initiated a dispute between the two authors, with Lowndes claiming that Christie had effectively stolen her character and complaining to the Society of Authors.

================
Contents first published 1926~1929. This book is in the public domain where copyright is “Life+70” or less, and in the USA.
.
Attached Thumbnails
Click image for larger version Name: Herc-Thumb.jpg Views: N/A Size: 239.6 KB ID: 225937  
Attached Files
File Type: azw3 Lowndes--HerculeanLabours [Hercules Popeau].azw3 (924.9 KB)
]]> Kindle Books GrannyGrump https://www.mobileread.com/forums/showthread.php?t=375314 <![CDATA[Mystery and Crime Lowndes, Marie Belloc: Herculean Labours [Det.Hercules Popeau]. v1. 13 Sep 2026]]> https://www.mobileread.com/forums/showthread.php?t=375313&goto=newpost Mon, 14 Sep 2026 03:09:16 GMT
A small collection of short stories featuring Detective Hercules Popeau. My own compilation.

Popeau Intervenes
At a glamorous hotel on the French Riviera, former Sûreté detective Hercules Popeau uncovers a dangerous romantic intrigue: Lord Waverton is infatuated with glamorous Russian émigrée Countess Filenska, and they harbor a secret desire to be rid of the lovely Lady Waverton.

A Race for Life
When heir-apparent Jack Brantwood is mistakenly presumed dead due to long absence, his wastrel cousin Arthur borrows against the property. Jack’s wife desperately enlists the aid of Hercules Popeau — she is certain the unscrupulous money-lenders will murder Jack in order to protect their investment.

A Labour of Hercules
Popeau overhears a distressed young woman shouting for help in English from behind a locked hotel room door, but management and staff try to brush off the incident. Trusting his sharp intuition, he launches an unsanctioned investigation.

================
Marie Adelaide Elizabeth Rayner Lowndes (née Belloc; 5 August 1868 – 14 November 1947) was an English novelist, and sister of author Hilaire Belloc. Active from 1898 until her death, she had a literary reputation for combining exciting incident with psychological suspense. Her most famous novel, The Lodger (1913), based on the Jack the Ripper murders of 1888, has been adapted for the screen five different times.

She produced over forty novels in all — mainly mysteries, and occasionally based on real-life crimes, though she herself resented being classed as a crime writer. She created the French detective Hercules Popeau, possibly before Agatha Christie’s creation of Belgian detective Hercule Poirot; this initiated a dispute between the two authors, with Lowndes claiming that Christie had effectively stolen her character and complaining to the Society of Authors.

================
Contents first published 1926~1929. This book is in the public domain where copyright is “Life+70” or less, and in the USA.
.
Attached Thumbnails
Click image for larger version Name: Herc-Thumb.jpg Views: N/A Size: 239.6 KB ID: 225935  
Attached Files
File Type: epub Lowndes--HerculeanLabours [Hercules Popeau].epub (871.8 KB)
]]> ePub Books GrannyGrump https://www.mobileread.com/forums/showthread.php?t=375313 <![CDATA[Hacks [K4NT] Kindle 4 Kindlet Launcher — Standalone .azw2 app shortcuts for K4NT]]> https://www.mobileread.com/forums/showthread.php?t=375312&goto=newpost Mon, 14 Sep 2026 02:24:34 GMT --ssh-pass to transfer over wi-fi). feedback, suggestions, or reports on other KDK 1.0 devices are very welcome! :)]]> hi everyone,

I'd like to share a small utility I vibecoded (sorry!) for owners of the Amazon Kindle 4 (Non-Touch / Black / Silver, FW 4.1.x):

Kindle 4 Kindlet Launcher
GitHub: https://github.com/DenSwitch/kindle4-kindlet-launcher

Quote:
author's note: I wanted to be fully transparent: this project was created entirely with AI assistance. i had the idea and needed a simple launcher on my Kindle 4, but don't know how to code java bytecode patching and signing myself. I'm sharing it here in hopes that it helps fellow K4NT owners!
what this tool does
a python script that generates a signed .azw2 Kindlet book. when you open this book from your Kindle Library, it executes your shell command or script (like starting KOReader or toggling USBNetwork).

pre-built launchers:
if you just want working launchers without running python, there are two ready-to-use files in the repo:
  • KOReader.azw2 — starts KOReader.
  • Toggle_USBNet.azw2 — toggles USBNetwork / USBMS.
just copy them to your Kindle's /documents/ folder.

requirements:
jailbreak + MobileRead Kindlet Kit (MKK).

building your own launcher:
requires python 3 (pip install cryptography pyasn1 pyasn1-modules paramiko):
Code:
python make_launcher.py --name "KOReader" --cmd "/mnt/us/koreader/koreader.sh"
(optional: add --upload <Kindle-IP> --ssh-pass <PASSWORD> to transfer over wi-fi).

feedback, suggestions, or reports on other KDK 1.0 devices are very welcome! :)
Attached Files
File Type: azw2 KOReader.azw2 (125.9 KB)
File Type: azw2 Toggle_USBNet.azw2 (125.8 KB)
]]> Amazon Kindle Den_Switch https://www.mobileread.com/forums/showthread.php?t=375312 Free Word to EPUB converter, browser-based, no account https://www.mobileread.com/forums/showthread.php?t=375311&goto=newpost Mon, 14 Sep 2026 00:32:31 GMT Sharing something I built rather than asking a question. Happy to take it down if this isn't the right spot.

I kept running into the same problem: a Word document with proper Heading 1 chapters gets mangled by most converters into one giant unstructured chapter, and the ones that work well either cost money or need a desktop install. So I built a free one that runs entirely in the browser.

You upload a .docx, it reads the Heading 1 styles as chapter breaks, builds a real table of contents, and hands back a standard EPUB 3 that opens fine on Kindle, Kobo, and every e-reader I've tested it on. No account, no email, no watermark. The file is converted and discarded server-side, nothing is kept.

Link: https://fabashelf.com/free-word-to-epub-converter/

It's part of a small site I run, FabaShelf, where authors sell audiobooks and ebooks direct and keep 90% of the sale. The converter came out of building that, and it stands on its own now. Genuinely curious if it handles anyone's edge cases (footnotes, images, nested lists) the way it should. I'd rather hear about breakage now than have someone quietly bounce off it. ]]> Creating and Editing FabaShelf https://www.mobileread.com/forums/showthread.php?t=375311 Calibre Companion https://www.mobileread.com/forums/showthread.php?t=375310&goto=newpost Mon, 14 Sep 2026 00:31:20 GMT Just as an FYI, Sam Cohen has returned and updated the IOS version and claims there is an Android version coming as well.

See https://www.mobileread.com/forums/sh...22&postcount=2 ]]> Calibre PeterT https://www.mobileread.com/forums/showthread.php?t=375310 A tool to flash eMMC and bypass secure boot on modern Kobos https://www.mobileread.com/forums/showthread.php?t=375309&goto=newpost Sun, 13 Sep 2026 23:01:59 GMT This post documents my work on the boot process of modern Kobo e-readers based on the MediaTek MT8113 SoC.

I have developed two things that may be useful for anyone experimenting with custom firmware on these devices:
  • A modified version of mtkclient that allows direct reading from and writing to eMMC. This is particularly useful for recovering bricked devices.
  • A patch for Little Kernel (LK) that disables signature verification, making it possible to bypass the secure boot chain and run modified boot images.

The boot chain

The most recent Kobo devices use the MediaTek MT8113 SoC. The boot chain is roughly:

BROM → Little Kernel (LK) → U-Boot → Linux

There may be other components in the chain, such as TEE, but they were not relevant to this work.

U-Boot verifies the hash and signature of the Linux FIT image. Likewise, LK verifies the hash and signature of the U-Boot FIT image. However, BROM checks the integrity of LK but does not verify its signature.

As a result, a modified LK can load a modified U-Boot, which can in turn load a modified Linux image, breaking the chain of trust from LK onward.

Read/write to eMMC

In order to investigate the boot process, a way to recover devices from potential bricks was needed.

MediaTek SoCs can boot in two different modes:
  • The normal boot process
  • Download Agent (DA) mode

DA mode allows uploading a custom payload over USB. The back cover must be opened to access the Download and Reset pads required to enter DA mode. The protective coating covering the pads must also be scraped away.

Follow the instructions in the README of this modified version of mtkclient to enter DA mode and read from or write to the eMMC. The procedure involves shorting Download and briefly shorting Reset while keeping Download shorted, allowing mtkclient to upload its payload over USB.

This modified version of mtkclient adds write support and improves transfer speeds by using eMMC commands CMD18/READ_MULTIPLE_BLOCK and CMD25/WRITE_MULTIPLE_BLOCK. Writing the entire 16 GB User Data Area on the Clara Colour takes around three hours.

For a first test, I recommend starting with the second Boot Area Partition, as it is unused and zero-filled.

Bypass secure boot

Bypassing secure boot requires disabling signature verification in both LK and U-Boot. While the source code for Kobo's vendor versions of U-Boot and Linux is available in the Kobo-Reader repository, the source code for its vendor version of LK is not publicly available.

With the source available, disabling signature verification in U-Boot is straightforward. See how this is done in kos or Quill-OS.

For LK, the binary itself must be patched. After extensive reverse engineering and trial and error, I was able to load a modified LK. This required replacing the hash verified by BROM with the hash corresponding to the modified binary. Once this was achieved, patching the signature verification performed by LK was relatively easy. I wrote a Python script that automates the process by disabling both the integrity and signature checks (although only the latter is needed) and updating the hash verified by BROM. This is also the approach used by kos to bypass secure boot.

Credits
  • enthdegree for showing the way with this project and helping me to get started with the low-level eMMC stuff.

Tools ]]> ratiz https://www.mobileread.com/forums/showthread.php?t=375309 How Do I Log In to the Server? https://www.mobileread.com/forums/showthread.php?t=375308&goto=newpost Sun, 13 Sep 2026 20:11:55 GMT I am running Calibre on my desktop computer (Kubuntu 26.04 if this matters). I am using my laptop (Debian 13 KDE, again, if that matters) in another room. I can connect to the Calibre server no problem using 192.168.8.115:8080/#library_id=Calibre&panel=book_list.

Today I got a new book on the laptop that I want to add to Calibre on the remote desktop. I press the + button, and select the book. When I try, I get an error:

"Failed to upload the file: Book.epub
You must be logged in to make changes to the library

Failed to communicate with "/cdb/add-book/7/n/Book.epub/Calibre", with status: [403 (error)] Forbidden

Anonymous users are not allowed to make changes"

I went to the desktop computer and created a login for myself, however on the laptop connection to the server I am not seeing anyplace to log in.

I'm sure I'm missing something simple. How do I log in to the Calibre server from my remote laptop?

Thank you ]]> Server Solo1959 https://www.mobileread.com/forums/showthread.php?t=375308 <![CDATA[Calibre showing "Unknown" books after sending to KOReader]]> https://www.mobileread.com/forums/showthread.php?t=375307&goto=newpost Sun, 13 Sep 2026 17:12:10 GMT Hi all,

I've recently JB my Kindle PW and was able to get the wireless sending to device over to KO Reader using this template after various instructions/threads on here and reddit.

- I created a custom Sort column where it's split by Fanfiction, Webnovels, Fiction and Nonfiction.
- The save template I use is: {#sort:||/}{author_sort:||} - {title} which I updated on the sending template and the device configuration
- The epubs transfer correctly to the correct subfolder
- However, although the files send and come up as "On Device" - when I click on the actual device they come up as Unknown
- I can manually link (as per first book) but wasn't sure if others were having to do that as it seems counterintuitive based on the 'automation' factor of setting up the template

Does anyone know why the unknown list is happening on the device? Thank you in advance!



]]> Devices ebonyandlace https://www.mobileread.com/forums/showthread.php?t=375307