* Egyptian Mythology: The entire book is an allusion to Egyptian mythology, with characters, creatures, and events inspired by ancient Egyptian beliefs. This includes gods like Ra, Anubis, and Set, as well as creatures like the Sphinx and the hippopotamus goddess, Taweret.
* The Great Pyramid of Giza: The Red Pyramid, a fictional pyramid, is a clear allusion to the Great Pyramid of Giza, one of the most famous and iconic structures in the world. This allusion reinforces the book's focus on ancient Egypt and its mysteries.
* The Bible: The story of the Red Pyramid involves the idea of a "chosen one" who must fulfill a destiny, which is an allusion to biblical stories like the story of Moses or the prophecy of the Messiah.
* The Book of the Dead: Sadie and Carter's magical tools are reminiscent of the Egyptian Book of the Dead, which is a collection of spells and incantations meant to guide the deceased through the afterlife.
It's important to note that these are just a few examples. The book is rich in allusions to various sources, including other works of fiction, historical events, and even pop culture references.