X-link to the DRM-free thread for a new Humble Bundle:
Humble Book Bundle Make: Essentials Maker Faire Special contains assorted craft/hobby/practical self-education books from the popular DIY tech magazine, including two new cartoon books about woodworking and electricity especially for younger readers, plus titles about family projects, making your own toys and musical instruments, and assembling your own instructional home laboratory from readily-available items, among other things which may be of interest to science/engineering-oriented kids.