Having proven himself capable of caring for the mythical creatures that dwell on Olympus, eleven-year-old Demon is summoned by the great god Hades to the Underworld to tend to Cerberus, the three-headed dog Guardian of the Underworld, which has been beaten by Demon's nemesis, Heracles.

Zeus is betrayed by Hades, captured and brought to the Underworld, and Perseus must abandon his attempts to retire to a quiet life as a fisherman, find Zeus, and end the Titans' struggle to rule the earth

"Are you well?" He asked. Her chest rose as she took as breath, studying him just as intently as he watched her. She was beyond anything he had ever imagined for himself - beautiful and gracious, far too good for the things he had done in his many lifetimes, and yet she remained, a steady light at his side - a beacon he could follow through the dark. It was in these quiet moments when he felt most overwhelmed by his love for her. "You haven't slept."...

"Hades, God of the Underworld, is known for his inflexible rule, luxurious night clubs, and impossible bargains. Used to control, he is not prepared to discover the Fates have chosen his future wife and Queen-Persephone, Goddess of Spring. Despite her attraction to the god, Persephone, an ambitious journalism student, is determined to expose Hades for his cruel and ruthless ways. She defies him at every turn, even as the attraction between them explodes....

When Zeus, Hades, and Poseidon continue on a new quest in the search for the Helm of Darkness, they discover many things in the Underworld that Hades does not fear except a giant three-headed dog.

"It is Persephone’s birthday, and she receives the ultimate gift: Hades confesses his desire for her, leading to their first kiss. But that doesn’t necessarily make things easier for the goddess of spring, who is still in over her head in gossip-driven Olympus. Persephone feels intense guilt over the official breakup between Hades and Minthe, she is struggling to find her footing in her fast-paced job, and—worst of all—the shades of her past...

"According to the ancient legend, the Lord of the Dead kidnapped the innocent daughter of Demeter--or did he? The truth is, Persephone is no damsel in distress, but a spirited young lady with an overbearing mother. A failed scheme by Apollo leads her to a chance encounter with the mysterious and handsome yet dispassionate Hades, who instantly appeals to her--right as he's struck by love's arrow. Now he must wrestle with his aching heart before he...