The penultimate book in the 'Heroes of Olympus' series. The stakes are higher than ever in this adventure that dives into the depths of Tartarus. 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 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...

Can Percy Jackson and the Half-blood Heroes succeed on their quest to find The Doors of Death or will the Greek Gods of chaos win their battle to stop them? Percy and his fellow demi-gods face the most important quest of all - the Prophecy of Seva.

It's a brand-new year and a brand-new journal and Greg is keen to put the humiliating (and secret ) events of last summer firmly behind him. But someone knows everything - someone whose job it is to most definitely not keep anything embarrassing of Greg's private - his big brother, Rodrick.

Greg Heffley finds himself thrust into a new year and a new school where undersize weaklings share the corridors with kids who are taller, meaner and already shaving. Greg is happy to have his sidekick, Rowley, along for the ride. When Rowley's star starts to rise, Greg tries to use his best friend's popularity to his own advantage.

Percy Jackson - the son of Poseidon - has had an unnervingly quiet school year. But then he discovers that the magical borders protecting Half Blood Hill, a summer camp dedicated to training young demi-gods, are failing. Unless something is done, the camp will be attacked by demons and monsters.