One Kick by Chelsea Cain

In this gripping thriller, a young woman named Kick Lannigan, who was abducted as a child and later rescued, is drawn back into the dark world of child abductions when a mysterious man named Bishop approaches her with a compelling offer. Now a skilled martial artist and weapons expert, Kick reluctantly agrees to help Bishop track down two missing children, using her unique insights and experiences from her own past. As they delve deeper into the sinister underworld, Kick must confront her own demons and navigate a web of secrets and lies to save the children and find redemption.