The Throne of Fire (The Kane Chronicles Book 2)

If Carter and Sadie don't destroy him, the world will end in five days' time. And in order to battle the forces of chaos, they must revive the sun god Ra - a feat no magician has ever achieved. Because first they must search the world for the three sections of the Book of Ra, then they have to learn how to chant its spells . . . Can the Kanes destroy Apophis before he swallows the sun and plunges the earth into darkness . . . forever? Rick Riordan has now sold an incredible 55 million copies of his books worldwide