The Throne of Fire is by Rick Riordan. The second book in The Kane Chronicles. Carter and Sadie must travel the world to find the three hidden parts of the Book of Ra so they can travel into the Duat and awake the sleeping god. If they succeed they hope to keep Apophis, the god of chaos, from rising and destroying the world. They must outwit the servants of chaos, the magicians of the House of Light who believe the path of the gods is evil, and the Egyptian gods themselves who aren't exactly excited to have Ra return. If you are a fan of Riordan's books, you will enjoy this one as well.
Ratings: 6th grade - 6 out of 10.