Rick Riordan

"The original heroes from The Lightning Thief are reunited for their biggest challenge yet: getting Percy to college when the gods are standing in his way. After saving the world multiple times, Percy Jackson is hoping to have a normal senior year. Unfortunately, the gods aren’t quite done with him. Percy will have to fulfill three quests in order to get the necessary three letters of recommendation from Mount Olympus for college. The first quest...

Jason has a problem. He doesn't remember anything before waking up on a school bus holding hands with a girl. Apparently she's his girlfriend Piper, his best friend is a kid named Leo, and they're all students in the Wilderness School, a boarding school for "bad kids." What he did to end up here, Jason has no idea—except that everything seems very wrong. Piper has a secret. Her father has been missing for three days, and her vivid nightmares reveal...

"In The Son of Neptune, Percy, Hazel, and Frank met in Camp Jupiter, the Roman equivalent of Camp Half-Blood, and traveled to the land beyond the gods to complete a dangerous quest. The third book in the Heroes of Olympus series will unite them with Jason, Piper, and Leo. But they number only six--who will complete the Prophecy of Seven? With old friends and new friends joining forces, a marvelous ship, fearsome foes, and an exotic setting, The Mark...