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.
And this is for bonus, Sequel of Percy Jackson & The Olympians. I already read them all :D It's a good stuff.