This is an early Koontz novel, published in 1984 originally under a pseudonym as Koontz, like Stephen King, was writing books at too fast a pace for his publisher’s marketing strategy. It shows Koontz’s developing interest in mashing up genres, in this case the police detective novel and the supernatural thriller, with a leaven of romance via the lead detectives. It doesn’t really stand out among Koontz’s many many novels but for us Koontz completists it’s interesting in showing his growing interest in orthodox religion which later culminated in him becoming a Catholic.