The House of Hades

This fourth book in the "Heroes of Olympus" series plunges Percy Jackson and Annabeth Chase into the terrifying depths of Tartarus, a journey filled with unimaginable monsters and challenges as they seek the Doors of Death. Simultaneously, the remaining five demigods race against time to find the mortal side of the Doors, unite warring Greek and Roman factions, and prevent the Earth goddess Gaea from awakening. Riordan masterfully weaves together Greek and Roman mythology with high-stakes adventure, exploring themes of courage, loyalty, and sacrifice through multiple character perspectives. Parents should be aware of the intense peril and dark settings, making it suitable for mature middle-grade readers who enjoy epic fantasy and mythological quests.

At the conclusion of The Mark of Athena, Annabeth and Percy tumble 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 Gaea's forces, and Percy and Annabeth can survive the House of Hades, then the Seven will be able to seal the Doors from both sides and prevent the giants from raising Gaea. But, Leo wonders, if the Doors are sealed, how will Percy and Annabeth be able to escape? They have no choice. If the demigods don't succeed, Gaea's armies will never die. They have no time. In about a month, the Romans will march on Camp Half-Blood. The stakes are higher than ever in this adventure that dives into the depths of Tartarus. This paperback edition will include a never-before-seen short story, "The Crown of Ptolemy," in which Percy and Annabeth fight alongside Carter and Sadie Kane, and more bonus content!