A Discovery of Witches by Deborah Harkness

This book is by turns enchanting and frustrating. I enjoyed the academic hunt for the book (although it ended up feeling like a bit of a red herring or a wild goose chase, because it's one of the major plot points left unsettled for the next two books in the trilogy). The vampire love story was somewhat disappointingly cliché--an incredibly hot vampire with questionable motives just has to take the female lead out a few times and she's entirely head-over-heels in love with him. I really liked that she has her own powers (with a bit of mystery), but at times she struck me as too passive. Although at times the book felt like an adult Twilight, I am intrigued by the series enough to keep reading.