Joan K said "Mystery readers: I need your help. We need to find books for discussion in the coming months."
I'd like to recommend David Liss's books. I loved his excellent historical mystery, WHISKEY REBELS. He is such a good writer, IMO. Great history and atmorphere. Many of the main characters in this book were real people, and I had fun looking them up in Wikipedia and reading more about them and seeing their pictures.
I also want to read his other books, including his latest, THE DEVIL'S COMPANY, mentioned by Jackie. The "company" is the British East India Company, which an Amazon reader was surprised to find was such a viper's nest of scheming.
Marj