What is tainted night tainted blood by e.s. moore about?

"Tainted Night, Tainted Blood" by E.S. Moore is a dark urban fantasy novel about a supernatural private investigator named Derek Brand who navigates a world filled with vampires, werewolves, and other paranormal entities while solving mysterious cases. As Derek delves deeper into his investigations, he unravels secrets about his own past and identity. The book explores themes of redemption, inner demons, and the blurred lines between good and evil in a vivid and gritty supernatural setting.