A brilliant new adventure series from the best-selling author of Percy Jackson. Carter and Sadie have nothing in common but their parents: their father Dr. Julius Kane a brilliant Egyptologist and their mother a famed archaeologist who died under mysterious circumstances when they were young. The siblings barely know each other but one night their father brings them together at the British Museum promising a research experiment that will set things right for their family. His plans go horribly wrong. An explosion unleashes an ancient evil - the Egyptian god Set who banishes Dr. Kane to oblivion and forces the children to flee for their lives. Now orphaned Carter and Sadie must embark on a dangerous quest - from Cairo to Paris to the American Southwest to save their father and stop Set from destroying everything they care about . . .