The Historian by Elizabeth Kostova

This huge book kept my interest all the way through although it was at times too intense to read much at a sitting. The vampires in this book are purely evil with no redeeming features at all. But they are very compelling. The history and travelogue of Eastern Europe is fascinating and compelling in its own right. The ending is complex and not what it first appears to be. The characters are well-drawn and interesting.
This is a book well worth reading.