Two-thirds of the way through The Last Olympian by Rick Riordan. This is the final book in the Percy Jackson series. I find myself reading the book with great sadness and a good dose of disgust. I blame it on the movies The Lightning Thief.
That movie screwed up really bad. Percy was five years too old. Two key characters were merged into one. Several other key characters were entirely left out. Oh, and the antagonist of the series was killed off. Basically, they made it impossible to make the rest of the series into movies. That makes me sad, because this last book would have made a terrific movie.
I suppose now kids will have to read about Greek mythology instead of watching it on the big screen.