The Book of Azrael by Amber V. Nicole

Samkiel, also known as Liam or the World Ender, begins the story in isolation, having retreated from the world after the devastating Gods War. Haunted by PTSD and depression, he hides from the expectations placed upon him as a god-like figure. However, an attack on his loved ones forces him to reenter the realm he swore never to return to, bringing him face-to-face with an old enemy he thought was long imprisoned.

Dianna, on the other hand, starts the story firmly aligned with the villains. Brutal and relentless, her actions—such as the vengeance-driven killing spree following her sister's murder—paint her as a formidable antagonist. Yet beneath her harsh exterior lies a deep love for her sister, Gabby. Dianna’s devotion runs so deep that a thousand years ago, she sacrificed her life to save Gabby, unwittingly binding herself to Kaden, the main villain. Now, as Kaden's reluctant servant, Dianna carries out his bidding, including hunting for an ancient relic, all while harboring resentment and a tendency to betray him when the opportunity arises.

Liam and Dianna couldn’t be more different: Liam is emotionally distant and burdened by his past, while Dianna is fiery, ruthless, and consumed by her grief. Yet both are deeply broken in their own ways. Their paths collide when Dianna agrees to work with Liam to stop Kaden from destroying the realms. Despite starting on opposing sides, they slowly learn to trust and grow alongside each other, even as the weight of their pasts and conflicting loyalties threaten to tear them apart.

The book builds to a devastating conclusion as Kaden murders Gabby, shattering Dianna’s remaining sense of hope. The loss drives her to the brink, leaving readers eagerly anticipating what’s next for these flawed, powerful, and compelling characters.