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 - set in the funny, mythical and action-packed world of Percy Jackson. As the son of Hades, Nico di Angelo been through so much, from the premature deaths of his mother and sister, to being outed against his will, to losing his friend Jason during the trials of Apollo. But there is a ray of sunshine in his...