Red Widow (Vivian Xu, Book 1)

Every fantasy has a price. Vivian Xu knows this all too well, having catered to the criminal underworld of the Czech Republic in ways no one can imagine. Now she finds herself at the mercy of a homicide detective who would sacrifice anyone to stop a deranged serial killer. Dangling by a thread to her freedom, Vivian becomes an unwilling informant in a game of hunt-or-be-hunted. Soon she discovers the shocking truth behind the murders, but she doesn't escape with her own mind unscathed. Vivian will pay any price to see society again, even at the cost of becoming just like the killer.