In the world of black ops, the most dangerous target is the truth. Madelyn Emmerson is the US Department of Defense's most effective cleaner. Codenamed 'The Client Killer,' she works under the impeccable cover of Rapidus Air and Sea Logistics, a shadowy DoD unit embedded in the heart of Hamburg. Her job is simple: when a 'client' becomes a liability, she pays them a visit. Permanently. Without a loose end. Her latest assignments seem routine. A reclusive engineer in Frankfurt. A corrupt lobbyist in Berlin. A rogue cell of terrorists who attacked a covert data center. But when Madelyn is tasked with hunting down the very team she was told executed the attack, she uncovers a conspiracy that reaches the highest levels of power. The trail of bodies leads to a devastating secret: a joint US-German surveillance operation, codenamed 'The Coconut,' so illegal its existence alone is a political atom bomb. To bury it, a general and a spy chief have orchestrated a brutal cover-up, and Madelyn is their unwitting instrument of destruction. She hasn't been eliminating threats; she's been silencing the witnesses. Now, hunted by the very machine that built her and caught in a deadly crossfire between the CIA and German intelligence, Madelyn has only one option: turn against her creators. Teaming up with the last of her intended victims-a brutal enforcer and a betrayed German spymaster-she must expose the conspiracy before the conspirators permanently close her file. For Madelyn Emmerson, the ultimate mission is no longer about following orders. It's about survival. And the most important client she's ever been assigned is herself. Perfect for fans of the relentless pace of The Gray Man, the intricate tradecraft of John le Carré, and the morally complex heroines of Killing Eve.