His obsession

In the shadows of the Abyss, a royal bloodline is threatened not by war, but by a mortal heart.
Chase, Prince of the Nine Circles, has broken the absolute law of the Underworld. To shield the woman he loves, he drives a permanent, sovereign Blood-Seal into her earthly sanctuary-shaking the subterranean realm to its bedrock and igniting rumors of a violent civil war.
To her, the quiet house, bright garden, and heavy wooden swing are simply a safe haven where she can heal from her past and chase her dream of defending human rights. She knows nothing of the dark territorial mark beneath her feet, nor the terrifying sovereign watching over her from the shadows.
When the High Archon summons his defiant heir to the Throne of Iron and Flame, Chase issues an ultimatum: accept his human mate, or watch their ancient lineage end forever.
Paralyzed by the ghost of his own lost Queen, the King offers a chilling bargain: Chase may keep her, but before her brief, fragile life slips away, she must make the ultimate sacrifice. To join him for eternity, she must willingly shed her humanity-taking her own life.