Although published sixth,
The Queen's Man is a prequel to the John Shakespeare series by Rory Clements. I've read a couple of other titles in this series, although not yet this one, and have quite enjoyed them. It has dropped to $0.99 at Kindle US. It is currently sitting at $2.99 at Kobo US, but I'm including the link for price-check purposes. This Kindle edition, which seems to be different (I hate it when they do this) than the one I purchased back in 2014, also supposedly contains a bonus short story.
This should not be confused with the OTHER
The Queen's Man, which is the first title in Sharon Kay Penman's excellent (IMO) and far-too-short four-book Justin de Quincy series, one of my top ten favorite series.
Kindle US:
https://www.amazon.com/Queens-Man-Jo...dp/B00RTY99EI/
Kobo US (price check):
https://www.kobo.com/us/en/ebook/the-queen-s-man-2