Keystone (Crossbreed Series: Book 1)
by Dannika Dark
**USA TODAY BESTSELLING SERIES**
They’re hot on the trail of a human killer who will stop at nothing to get what he wants. One misstep during her probationary period could jeopardize Raven’s chance at redemption, and her partner would love nothing more than to see her fail. Will Raven find the courage to succeed, or will she give in to her dark nature?