Fiction by E.C. Myers
This is the sequel to Fair Coin, a great sci-fi novel I read recently. It's a great conclusion and answers a lot of questions I had about the ideas behind the first story. Also I liked the characters a lot, so it's always fun to see what happens next for them.
I think I'd say you MUST read the first book first on this one.
Also I don't like the cover pictured above; my copy had a better one that matched the first book. --->
Image from https://www.goodreads.com