When Pleasure Rules — J.K. Beck

Seven innocents have been brutally murdered on the streets of Los Angeles, yet the Shadow Alliance has no suspects and no leads. And as more bodies are discovered, the age-old feud between the vampires and werewolves threatens to explode and turn the city into a living nightmare.

With her back to the wall, Lissa Monroe -- a strong-willed, ravishingly beautiful succubus who entices men to surrender their souls -- agrees to go undercover for the Alliance. Her mission: infiltrate the mind of werewolf leader Vincent Rand, a ferociously alluring enemy who has a powerful hold over her. Lissa has never lost control of her deepest desires, but Rand is an impenetrable paradox, a principled soldier who fears nothing -- except perhaps the darkness of his own past. As the city of Angels teeters on the brink of apocalypse, these two adversaries must join together to have even the slimmest chance of surviving a more lethal enemy hidden in plain sight.