Heroes of Olympus Series by Rick Riordan

We follow the journeys of demigods from Camp Half-Blood in this sequel to the Percy Jackson books. The first book, The Lost Hero  introduces us to a new brainwashed kid named Jason. He was plopped into a life, not knowing who he is or where he came from, holding hands with a girl he'd later find out is named Piper and a guy named Leo making jokes. He must figure out who he is, and why he can't remember. These books are from many different people's point of views. They are funny, action-packed, books about the struggle of being a demigod. The books in order are The Lost Hero, The Son of Neptune, The Mark of Athena, The House of Hades, and The Blood of Olympus.