Heartless (Crossbreed #9)

Despite the spoils of a solid relationship and an idyllic life at Keystone, Raven is itching for the thrill of another big case. Things begin to heat up when a dangerous assignment falls in her lap.

Searching for the mastermind behind an illegal fighting ring is no easy feat, but as the weeks roll by, Raven's undercover job begins to take an unexpected emotional toll. It's a deadly mission, and if she's not careful, she could lose everything.