Reader Question: Judith Tarr

This question was buried in the comments of the last thread.  I can't choose my favorite Tarr book.  Who can suggest a good place for Claire to start?  It would probably be helpful to give a non-spoilerish synopsis, and/or why you particularly like this one, rather than just titles.

Question: What is your favorite Judith Tarr novel? I've never read any of her work. the one she's writing now sounds great.