The fourth book in the Percy Jackson series by Rick Riordan is The Battle of the Labyrinth. The tension is growing between Kronos and the Olympians and it seems like the war is coming. Percy and his friends head out to the labyrinth in hopes of stopping Kronos’s border invasions. To make things even more interesting, before Percy leaves school a new student appears and is being chased by demon cheerleaders. It seems that things are just going to get worse from here on out. Don’t worry, the suspense and humor continues on even in the fourth book. At this point in the series the characters are really starting to develop and come into their own, allowing the reader to become even more attached to the story. Most of the people that I have talked to said they had to hurry and pick-up the fifth book to find out the exciting conclusion.