Love at Stake, Book 10
Heat Factor: Smoldering, but watch out for Hellfire.
Character Chemistry: Cosmic insta sparks.
Plot: Fallen angel tries to get back into heaven by helping some good vampires defeat an evil vampire. Learns about love in the process. But specific sexual love, not the general anonymous love for humanity that all angels experience.
Overall: A romance novel that is also a meditation on faith and free will.