Demigods & Magicians (Crossover Novellas)
Reading Order.

In this adventure, Annabeth encounters more oddities in the subway than usual, including a two-headed monster and a younger blond girl who reminds her a little of herself. This is the story fans have asked for, in which Annabeth Chase teams up with Sadie Kane. The demigod daughter of Athena and the young magician from Brooklyn House take on a larger-than-life foe from the ancient world. Perhaps even more disturbing than the power-hungry god they encounter is the revelation that he is being controlled by someone—someone all too familiar to Sadie. As a special bonus, the first chapter of THE BLOOD OF OLYMPUS, the final book in the Heroes of Olympus series, is included.

In their first encounter, demigod Percy Jackson and magician Carter Kane had to battle a giant crocodile on Long Island. A month later, Annabeth Chase ran into Carter's sister, Sadie, on the A train to Rockaway, where the pair fought a god named Serapis. Now trouble is brewing again, this time on Governor's Island. An ancient Egyptian magician named Setne has come back from the dead and is experimenting with Egyptian and Greek magic, trying to become a god himself. He's so powerful and tricky that all four—Percy, Annabeth, Carter, and Sadie—have to team up against him. But their usual weapons and spells aren't going to cut it this time. Will the heroes be taken down by a wannabe god who looks like Elvis, or will they rise to the challenge? Told from Percy's point of view, this third demigod-magician crossover story has all of the spunk and action that Rick Riordan fans crave.

Magic, monsters, and mayhem abound when Percy Jackson and Annabeth Chase meet Carter and Sadie Kane for the first time. Weird creatures are appearing in unexpected places, and the demigods and magicians have to team up to take them down. As they battle with Celestial Bronze and glowing hieroglyphs, the four heroes find that they have a lot in common--and more power than they ever thought possible.