The Lost Hero by Rick Riordan
hands with his girlfriend Piper and his best friend Leo is near too. The problem? Jason doesn't remember anything before that moment he appeared on the bus. He knows that something is very wrong. Then they get attacked by storm spirit. They get help by so some kids and are taken back to their camp, but it all somehow feels very wrong.
Piper has a secret. Her dad is missing and she has been getting these horrible nightmares. She has to betray her friends to save him.
Leo is good with tools, but not so much with people. When they arrive at Camp Half-Blood, he likes it right away, even though he is still different from his bunkmates.
Soon they have to go on a quest to save Hera if Jason ever wants to get his memories back. But the quests are never easy and never go according to plan.
A new book, told from three different points of view, starts a new exciting series, that follows the heroes as they try to save the Gods from the giants.
The only thing wrong with it, there is no Percy.