The second book in the latest series from international bestselling author Rick Riordan He was once an immortal God now hes an awkward teenager. Things arent going well for Apollo. Theres only one way he can earn back Zeus favour and thats to seek and restore the ancient oracles but thats easier said than done. Apollo must head to the American Midwest where rumour has it a haunted cave may hold answers. There are a few things standing in his way though. The cave could kill him or drive him insane. Oh and a Roman Emperor whose love of bloodshed makes Nero look tame.To stay alive Apollo needs the help of a mortal goddess a bronze dragon and some familiar faces from Camp HalfBlood. Will he survive the greatest challenge of his four thousand year existence More books by Rick RiordanThe Percy Jackson seriesPercy Jackson and the Lightning ThiefPercy Jackson and the Sea of MonstersPercy Jackson and the Titans CursePercy Jackson and the Battle of the LabyrinthPercy Jackson and the Last OlympianPercy Jackson The Demigod FilesThe Heroes of Olympus seriesThe Lost HeroThe Son Of NeptuneThe Mark of AthenaThe Heroes of Olympus The Demigod FilesThe Kane Chronicles seriesThe Red PyramidThe Throne of FireThe Serpents ShadowThe Magnus Chase SeriesMagnus Chase and the Sword of SummerMagnus Chase and the Hammer of Thor Magnus Chase and the Ship of the Dead