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 a...
Demigods Nico di Angelo and Will Solace must endure the terrors of Tartarus in their attempt to rescue an old friend in this thrilling adventure co-written by best-selling author Rick Riordan and a...