Onyx Assassins Books in Order

The Onyx Assassins series shifts from rinks and stadiums into a dark, lush paranormal world ruled by vampires, witches, and shifters. At its center is a secretive order of vampire warriors who enforce an ancient Covenant that keeps humans ignorant of the supernatural, at least until fate and forbidden love start breaking the rules.

Crimson Covenant opens with Alek, the vampire king who has worn the crown for two centuries and never questioned the law that any human who learns their secrets must die. When human Lyric O’Brien stumbles into his world and a deadly conspiracy, her blood and her stubborn courage force him to choose between the Covenant and the woman who has become his weakness.

In Crimson Highlander, his gruff second-in-command discovers his mating mark belongs to Valor, the daughter of their greatest enemy, and partnering with her on a rescue mission may save the realm or get him killed. Crimson Warrior follows the king’s master of combat and Olivia, his best friend and fellow fighter, as they fake a mating bond to convince her rigid family to awaken a cadre of ancient Hunters.

Crimson Truth centers on the realm’s master interrogator, whose rare magic tattoos lies onto his skin, and Jocelyn, the outspoken witch heiress he should never touch. Their joint mission to recover a missing princess turns into a slow-burn, interspecies romance that carries a death sentence. In Crimson Kiss, a lethal assassin is confronted with the fact that the king’s little sister, princess Avianna, carries his mating mark even as she prepares to marry their enemy to stop the war.

Later books widen the circle. Crimson Hunter features a time-stopping assassin who falls for Grace, a human whose terminal illness he cannot simply magic away, while Crimson Shifter lets an immortal who can shift into any animal pose as a noblewoman’s panther to uncover a plot inside her disgraced vampire family. The final story, Crimson Mate, pulls together the war, the politics, and the lingering promises of the earlier books to give the assassins’ world one last, hard-won chance at peace.

Throughout the series you get court intrigue, secret alliances, and big battles alongside very personal stakes like grief, guilt, and the fear of never being chosen. The tone stays fast paced and steamy, but there is plenty of found family as the assassins and their mates build a new kind of kingdom together.