The collected edition that, for the first time, binds Rick Riordan's three crossover novellas into one volume, uniting the worlds of Percy Jackson and the Olympians with The Kane Chronicles. Across the three stories, Greek demigods Percy Jackson and Annabeth Chase cross paths with Egyptian magicians Carter and Sadie Kane, discover how much they have in common, and ultimately join forces against a single ancient enemy bent on fusing Greek and Egyptian magic for an evil purpose. In The Son of Sobek, narrated by Carter, he investigates a monster on Long Island and runs into Percy; the beast is a petsuchos, a giant immortal crocodile, son of the god Sobek, that the two strip of its enchanted necklace. In The Staff of Serapis, narrated by Annabeth, she meets Sadie Kane while battling a hybrid monster, and together they confront Serapis, a Greco-Egyptian god scheming to destroy both pantheons, only to realize a deeper hand is at work. In The Crown of Ptolemy, narrated by Percy, all four heroes finally team up against Setne, an undead Egyptian magician trying to combine Greek and Egyptian magic to make himself a god and rule the world. Fast-paced, funny, and rich in banter between casts who shouldn't get along, the collection rewards fans of both series and also includes bonus material, a preview of The Hidden Oracle that launches The Trials of Apollo.