Third in the Preternatural Investigation Agency series. Lilith's Day is a time of celebration and remembrance among vampires. As the holiday looms, a series of horrific deaths shocks the vampire community of Riverside and gathers the attention of Tom Duncan and his agents at the Preternatural Investigation Agency. The vampires' blood products had never been considered vulnerable to tampering, so when the cause of death points to poisoning, everyone is shocked. Finding the culprit amidst unknown motives, numerous suspects, and rising tension between vampires and humans proves to be complicated. At the same time, Agent Max Boyd finds herself having to face her past when a dangerous thief makes his presence known in Riverside. Reliving mistakes you tried to put behind you is never easy, as Max well knows, but when the thief puts her friend's life in danger, that is exactly what she must do.