The Red Pyramid (the Kane Chronicles Book 1) (Rick Riordan)

Percy Jackson fought Greek Gods. Now the Gods of Egypt are waking in the modern world... 'I guess it started the night our dad blew up the British museum...' Carter and Sadie Kane's dad is an Egyptologist with a secret plan that goes horribly wrong. An explosion shatters the ancient Rosetta stone and unleashes Set, the evil god of chaos...