Gr 4–9—Riordan takes the elements that made the "Percy Jackson" books (Hyperion) so popular and ratchets them up a notch. Carter, 14, and Sadie, 12, have grown up apart. He has traveled all over the world with his Egyptologist father, Dr. Julius Kane, while Sadie has lived in London with her grandparents. Their mother passed away under mysterious circumstances, so when their father arrives in London and wants to take them both on a private tour of the British Museum, all is not necessarily what it seems. The evening ends with the apparent destruction of the Rosetta Stone, the disappearance of Dr. Kane, and the kidnapping of Carter and Sadie. More insidiously, it leads to the release of five Egyptian gods, including Set, who is their mortal enemy. Carter and Sadie discover the secrets of their family heritage and their ability to work magic as they realize that their task will be to save humanity from Set, who is building a destructive red pyramid inside Camelback Mountain in Phoenix. The text is presented as the transcript of an audio recording done by both children. Riordan creates two distinct and realistic voices for the siblings. He has a winning formula, but this book goes beyond the formulaic to present a truly original take on Egyptian mythology. His trademark humor is here in abundance, and there are numerous passages that will cause readers to double over with laughter. The humor never takes away from the story or from the overall tone. A must-have book, and in multiple copies.—Tim Wadham, St. Louis County Library, MO