The Sea of Monsters

After a year spent trying to prevent a catastrophic war among the Creek gods, Percy Jackson finds his seventh-grade year unnervingly quiet. But things don’t stay quiet for long. Percy soon discovers trouble at Camp Half-Blood–the magical borders protecting Half-Blood Hill have been poisoned by a mysterious enemy. To save the camp, Percy needs the help of his best friend, Grover, who has been taken prisoner by the Cyclops Polyphemus and is somewhere in the Sea of Monsters–better known as the Bermuda Triangle.