An ancient power reawakens. The undead gather for war. And humanity's only hope struggles to hold on to her humanity.

FBI Special Agent Nicole Lange is closing in on an elusive international arms dealer, Harlon Cord, a criminal monster. But Cord now possesses something that has made him a far worse foe, an ancient, malevolent relic. The Unholy Grail.

Forged in hell to tempt Judas Iscariot, the Grail promises dominion over all of vampire-kind, and thus the power to remake Earth how its wielder envisions ... At the price of unleashing the Apocalypse.

Now Nikki is thrust into a world of real monsters, of profane magic, and of dark bargains. The darkest bargain, her own: commit to becoming The Dhampir -- the half-human, half-vampire bridge between spiritual realms that alone can destroy the Grail.

But the closer she comes to the Unholy Grail, the stronger her hunger -- and the more inviting its promise.

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For readers who like: competent adult heroines with actual careers • FBI procedural mystery colliding with the supernatural • dangerous rather than dreamy vampires • dhampir lore • temptation and corruption arcs • ancient religious mysteries • morally complicated power • action and dark humor • a thread of romance and sexual content, but not romantasy.