Books like King of the Underworld by V. Peters

Abbey defies God’s command and foils the Seven Sleepers’ mission, only to confront an ominous Empress of the Underworld who threatens her and her friends with a dark magic spell.

When a group of five Scottish high‑schoolers goes on a field trip to a North Sea island, a sudden storm forces them into underground caverns. Alone and uncertain, they must confront their personal fears, rivalries and the harsh demands of survival.

**Some flowers bloom only in the dark…** In the land of the dead, Queen Hades’ word is law. Hades gets what she wants—always—and what she wants is a certain goddess of the springtime. Innocent Persephone chafes beneath her mother’s hawkish gaze and mercurial temper. Demeter has rebuffed all her daughter’s suitors, but she is not yet satisfied; she strives to crush Persephone’s spirit. Still, when Hades pulls her into the dark realm of the underworld, Persephone longs for the world above, even if it means an eternity under her mother’s thumb. With her tears and pleas for freedom ignored by pitiless Hades, Persephone must learn to satisfy her keeper in all ways, lest she suffer the consequences. And though she cannot deny that something blooms within her, something forbidden, Persephone despairs of ever feeling the sun upon her skin once more. No matter the cost, Hades intends to keep her. Forever.

Gemma believes her mind is gone, but she discovers clues to a hidden plan by Stephan involving a mysterious star—and the only place to find answers is the Underworld, a realm no one dares to visit.

To silence the voices in her head, Ashlyn Darrow arrives in Budapest where she, seeking help from men rumored to have supernatural abilities, is drawn to their most dangerous member, Maddox, who is trapped in a hell of his own.