The Wicked Ending (Wicked)
Pru Schuyler

Silas Moreno, an ex-marine, is moving through the motions of his new civilian life. He’s lost when he returns home from his final tour overseas as the sole survivor of his unit, carrying a weight no one can imagine. Completely adrift, he stumbles upon a dojo that offers him a newfound purpose, teaching self defense.
Brooke is his star pupil, the fastest learner he's ever worked with. He doesn't question her rapidly growing skills until she shows up with her torso covered in bruises that were definitely not caused during their sessions. He cares deeply about her, and wants to discover the reasons she is so desperate to turn her body into a weapon. Throughout their months of training, they have grown close but Brooke always seems to be slightly out of reach. As their relationship progresses, so does the darkness and danger lurking in the shadows.
When an envelope filled with photos of her at various places, including outside of her apartment, shows up on her doorstep, she is forced to choose someone to trust. But time is running out, her friends are being taken. And she’s next. No matter who she trusts or what steps she takes, only one of them will make it out of this alive.
Her past is coming back for her, and it will either kill her or set her free.