Percy Jackson and the Olympians- The Lightning Thief

Look, I never asked to be the son of a Greek god. I was just a normal kid. . . until I accidentally vaporized my maths teacher. Percy Jackson is having a bad week. His life has gone from totally normal to monsters-from-Greek-mythology-randomly-appearing kind of strange. Worse still, the king of the gods thinks Percy has stolen his all-powerful lightning bolt.

Rick Riordan