The Crown of Ptolemy

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.
"I stared at my hand. There wasn’t even a trace of the hieroglyph that Carter Kane had drawn on my palm almost two months back. He’d assured me that the magic couldn’t be washed away, but with my luck, I’d accidentally wiped it off on my pants or something. I tapped my palm. “Carter. Hello, Carter. Percy to Carter. Paging Carter Kane. Testing, one, two, three. Is this thing on?” Still nothing. Usually I wouldn’t panic if the cavalry failed to show. Annabeth and I had been in a lot of bad situations without any backup. But usually we weren’t stranded on Governors Island in the middle of a hurricane, surrounded by fire-breathing death snakes."