From New York Times #1 best-selling author Rick Riordan and award-winning author Mark Oshiro comes a new standalone adventure featuring two of the most popular characters from the world of Percy Jackson and the Olympians. ONE PROPHECY. TWO DEMIGODS. A HEROIC QUEST. Nico di Angelo is pretty familiar with the realms of death, being the son of Hades and all. So when a desperate voice starts plaguing his dreams, Nico is convinced it's coming from the Underworld and belongs to an old friend - a reformed Titan called Bob. Then an ominous prophecy leaves Nico in no doubt - Bob needs his help and Nico must rescue him. Of course Nico's boyfriend, Will Solace, the son of Apollo (the god of light) insists on joining the quest too. But can will even survive in the darkest part of the world? And what does the prophecy mean when it says that Nico will have to leave something of equal value behind? As Nico faces demons both internal and external, his relationship with Will is tested to its very core. Can love find its way, even through the depths of hell? Rick Riordan, Number 1 New York Times bestselling author, March 2024 Mark Oshiro, winner of the Schneider Family Book Award, 2019

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