Great book all in all, well written and super descriptive. Romance, but I would also say it is loosely historical fiction as well. The book really gives you an inside look to the main characters medical mind. Surprisingly little to no differences from the tv show (obviously the book came first, but I still found less differences than I anticipated). If you liked the show and remember everything I still recommend you read this! Its excellent and you get way more insight into how Claire thinks.