At the conclusion of The Mark of Athena, Annabeth and Percy tumble into a pit leading stragith 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 Door 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 from both sides and prevent the giants from raising...

"Shadow bruja Ren Santiago was relentlessly pursued by the evil Aztec Lords of Night, who claimed that she was destined to be their queen, a destiny she wasn't willing to accept. So she chose death instead. Too bad death wasn't the answer to her problems. Ren soon realizes she must return to the land of the living to make things right. Unfortunately, that means negotiating with Ixtab, queen of the underworld. Ixtab offers her ten days aboveground...

Four years ago, five kids started a game. Not all of them survived. Now, at the end of their senior year of high school, the survivors--Owen, Madeline, Emerson, and Dax--have reunited for one strange and terrible reason: they've been summoned by the ghost of Ian, the friend they left for dead. Together they return to the place where their friendship ended with one goal: find Ian and bring him home. So they restart the deadly game they never finished--an...

"Pat and Jen are heroes. After defeating Evil Jen and closing all the portals to the underworld, they have nothing to worry about, no villains to defeat, and no adventures to go on. Awesome, right? Until a mysterious voice tells Jen that she has to go to the underworld to uncover a secret about her past. It is a quest she can only undertake alone. With Jen off to find out the truth and Pat desperate to find Jen, the heroes almost don't notice that...