The Battle of the Labyrinth is the most interesting book yet. Percy Jackson is back, yet again, for the 4th installment in the Percy Jackson series. Finally, Annabeth gets a quest for herself, and she chooses Percy, Grover AND Tyson to go with her. The tradition is three people on a quest since the ways of Ancient Greece, and it is not like Annabeth to break ANY rules. They must travel into the Labyrinth built by Daedalus, and face against many Greek icons to improve your mythilogical knowledge, until you suddenly start to think that you too might be a demigod.