The Swan Thieves - Elizabeth Kostova This is becoming the book that doesn't end.
I loved it at first, but when I hit the 400s, I started to lose interest. It's not the story that's losing me; I think it's more the long, drawn-out way the story is being told. Do I need every last detail about a meeting in a museum? Maybe, but I don't see it right now. Fingers crossed it all comes together in the end.

ETA: It turned out not so bad after all. No, the ending didn't make up for the looong drawn-out descriptions of certain things, but I felt satisfied with the conclusion. It's not a story that will stick with me - I was able to pick up another book right away - and I won't be rereading this, but I can give it a solid rating of Good.