Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A book I continue to reread.

I thought I'd throw a vote for this book as it's one that I continue to reread and enjoy. This story successfully combines several genres - Fantasy/Sci-Fi, Historical Drama, and Medical Mystery. Granted, of the three, the Sci-Fi genre is least represented so if you're looking for a book that's all about time travel you'll most likely be disappointed. I find the glimpses into medieval life fascinating and would recommend it to those who enjoy learning about what life was like in times past.