There are some pretty weird grown-ups living in Bailey City. But could the dentist who has extra-large muscles and talks of being champion of the world really be Hercules, the strongest man in the world? The Bailey School kids are going to find out!

Demigod Percy Jackson, still with no memory, and his new friends from Camp Jupiter, Hazel and Frank, go on a quest to free Death, but their bigger task is to unite the Greek and Roman camps so that the Prophecy of Seven can be fulfilled.

"Inspired by the critically acclaimed film written and directed by Oscar winner Guillermo del Toro, and reimagined by New York Times bestselling author Cornelia Funke, this haunting tale takes readers to a darkly magical and war-torn world filled with richly drawn characters including trickster fauns, murderous men, child-eating monsters, courageous rebels, and a long-lost princess hoping to be reunited with her family"--Provided by publisher.

Annabeth and Percy have tumbled into a pit leading straight to the Underworld. The other five demigods have to put aside their grief and follow Percy's instructions to find the mortal side of the Doors of Death. If they can fight their way through the Gaea's forces, and Percy and Annabeth can survive the House of Hades, then the Seven will be able to seal the Doors both sides and prevent the giants from raising Gaea. But, Leo wonders, if the Doors...