Did you know of Donn Kushner's book, "The Book Dragon"? It takes place in dragon time, which includes late Renaissance, only Kushner's dragon sees history accurately, for a dragon. Or a friend or relative does, and tells him the story. It's one of my all-time favorite books, so I got "Swordspoint" by Ellen as well, though I've only read a few chapters yet. I figured they had been related somehow; the authors.
Anyway, I suggest one book by Michael Crichton to you, "Timeline," and another "The Three Musketeers" by Alexander Dumas pere (and if you want the Barnes and Noble classic, it's also by Barbara T. Cooper)...
...and perhaps "Bella Donna: A Renaissance Mystery (Renaissance Mysteries)" by Barbara Cherne '01, or maybe I-don't-know "Eva's Secret of Granada" by M.L. Eqatin, '07.
That's all I either already know or heard about.