Percy Jackson and the Battle of the Labyrinth (Book 4) by Riordan Rick

This is the fourth novel of the Percy Jackson and the Olympian Series. The fifteen-year-old demigod attempts to stop Luke Castellan and his army from Camp Half-Blood through Daedalus' Labyrinth. This can be done by finding Daedalus and trying to convince him to not give Luke the Ariadne's string. 

Summary of the Book

Percy Jackson does not expect Freshman Orientation to be fun. However, when a mysterious mortal person enters the campus followed by demon cheerleaders everything goes from bad to diabolical. The war between the Titans and the evil lords Kronos is coming close and there's hardly any time left. Camp Half-Blood is more vulnerable now as Krono's army prepares to invade them. Percy and his friends set out thorough the Labyrinth which has stunning surprises at every turn. Humor and hardcore action are probably what make this novel the most thrilling one of the series. 

About the Author

Rick Riordan is an American author who is best known for the Percy Jackson and the Olympian Series. He graduated from Alamo Heights High School. He was featured as a guest in the San Diego Comic-Con International Fest 2010.