Five For Silver is the fifth in Mary Reed/Eric Mayer's John, the Lord Chamberlain series. It's $1.99 right now in the US, and discountable at Kobo US. Per SYKM, it was a finalist for the 2005 Bruce Alexander Award.
Kindle US:
https://www.amazon.com/dp/B07VLBR76C
Kobo US:
https://www.kobo.com/us/en/ebook/five-for-silver-10