Percy Jackson and the titan's curse - Rick Riordan (Percy Jackson and the Olympians #3)

IT’S NOT EVERY DAY YOU FIND YOURSELF IN COMBAT WITH A HALF-LION, HALF-HUMAN. But when you’re the son of a Greek god, it happens. And now my friend Annabeth is missing, a goddess is in chains and only five half-blood heroes can join the quest to defeat the doomsday monster. Oh and guess what. The Oracle has predicted that not all of us will survive . . .