Animorph Percy Jackson and the Olympians: The Titan's Curse

While helping Grover save two half-blood siblings from the manticore, Annabeth been kidnapped and Percy meets Artemis and her maiden hunters. But things get worse as Artemis been kidnapped by the same titan the Manticore works for. Now Percy has to sneak on the quest with Thalia, Grover, and a hunter that hates men to save Annabeth and Artemis from the Titan's Curse.