Cerulean Sins is a horror/mystery/erotica novel by American writer Laurell K. Hamilton, the eleventh book in the Anita Blake: Vampire Hunter.

Cerulean Sins apparently takes place some time after the events of the previous novel, Narcissus in Chains.

Third, Anita learns of a series of shockingly brutal rapes and murders, apparently committed by a shapeshifter serial killer.

More alarmingly, Anita begins to believe that Belle Morte is planning a war against the Mother of Darkness, the oldest and most powerful of the world's vampires.

In the epilogue, Anita explains that she is continuing to date Micah and Jean-Claude, and that she has also added Asher to her list of lovers.

He had slaughtered the three women, reduced them to handfuls of meat and other body parts, essentially painting the wall with their blood.