The Mark of Athena (Heroes of Olympus #3)

The phenomenally successful Rick Riordan is back with the next thrilling installment of the Heroes of Olympus series . Can Percy Jackson and the Half-blood Heroes succeed on their quest to find The Doors of Death or will the Greek Gods of chaos win their battle to stop them? Percy and his fellow demi-gods face the most important quest of all - the Prophecy of Seven.