The Titan's Curse (Percy Jackson and the Olympians, #2)
October 2011: I had completely forgotten what happened in this one before I re-read, which was actually kind of nice for two reasons: 1) It almost never happens to me. Once I read a book, I usually remember it in vivid detail, even years later, and 2) It was sort of like reading it for the first time, except not really because instead of being surprised, it was like things I knew but had forgotten were coming back to me, and that's always a good feeling. Unfortunately, it's becoming an ever more familiar feeling because I am apparently losing my mind with every passing minute. Getting old SUCKS BALLS.
[First read December 2009]