The Battle of the Labyrinth by Rick Riordan is the fourth book in the series. In this book Percy, Tyson, Grover, and Annabeth go into the Labyrinth to find Daedalus, the creator, before Luke does. The only way Percy and his friends find their way through the maze is by using the help of Rachel, a mortal who Percy met at Hoover Dam. Meanwhile, back at camp the half-bloods are preparing for war against Kronos’s army.
5 out of 5 stars