"Throne of Fire" is the second book in the Kane Chronicles series by Rick Riordan. It follows siblings Carter and Sadie Kane as they continue their quest to save the world from ancient Egyptian gods and monsters. The story is filled with adventure, magic, and the challenges of balancing their family dynamics with their responsibilities as magicians. In this installment, the Kanes must awaken the Phoenix to defeat the evil god Set. They travel through various locations, including Cairo and the Duat, the Egyptian underworld. The book combines humor and mythology, making it an engaging read for young audiences.