The Spies That Bind — Diane Henders

Book 11 of the NEVER SAY SPY series Secret agent Aydan Kelly is hoping to resume her peaceful life as a bookkeeper, until her director issues an ultimatum: Go undercover as an arms dealer or go to jail for life. But when Aydan realizes her co-worker's son has been taken by a serial killer, she defies orders in an attempt to save the child. Neglecting her undercover assignment may cost more than just her freedom. When the gunrunner she's been baiting threatens her loved ones, Aydan must choose between protecting them herself or entrusting their safety to geriatric amateur vigilantes while she closes in on the killer. How much will she risk for a child who may already be dead?