The Last Olympian (Percy Jackson and the Olympians, Book 5)
This is just like the rest of the series, which is not a bad thing. In my opinion, this series was even better than "Harry Potter". While "HP" started out great, the last book was a travesty. It seemed like J. K. Rowling just rushed through it to be done with the series. "Percy Jackson" ended quite well, though, and its ending makes it better than "HP."
