The fourth incredible adventure in the bestselling series. Now with a thrilling new cover look.Half Boy. Half God. ALL Hero.Honestly, blowing up another school was the last thing I wanted to do.As the son of a Greek God, I've had my share of near-death disaster - and now my arch enemy Luke wants to invade our camp via an ancient labyrinth. If he succeeds, thousands of bloodthirsty monsters will attack. So it's goodbye sunshine, hello darkness as four of us descend into the terrifying underground and beyond . . .RICK RIORDAN IS THE MYTHMASTERThe Greek Gods are alive and kicking - go to www.rickriordanmythmaster.co.uk and see for yourself