The Lost Hero by Rick Riordan

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.

https://rapidgator.net/file/b181eacde67b02094d0011d83f4dd9ba/

https://1dl.net/4p1xoerkoeph