Backlash {Fourth book in the "Born to Be a Hunter" Series}

Jackline Winchester has been pulled from the darkness and she has no memory . . . of anything. She can't even remember her own name. But when the alliance that saved her, The British Men of Letters, tell her who she is, she can't help but believe it. She's sent on missions to kill monsters and she is amazing at it. But one final case sends her over the edge when she is sent to kill some very dangerous (non)ghouls. Memories flash in her head and she has to figure out what they all mean. She finds out that those ghouls are actually hunters and are Dean, Sam, Matt and Mary. Once she gets her memory back, the Brits want to take back what is "theirs" so they plan to hurt Jack in the most painful way to get her. The most painful way, though is something that can break her beyond repair. They have her little Mary. What will happen when Jack finds out that they do?