Killer

By Iris Sweetwater

He survived the torture of a black-site prison, but the war inside his head is one he's losing.

Colt is the Sergeant at Arms for the Serpent Sinners, a man defined by his strength and his steel-cold discipline. But after being abducted and broken by a rogue task force, the man who returned is a stranger.

He's a powder keg of unpredictable rage, a "Killer" who is now turning that violence on himself in the boxing ring, jeopardizing his life and the future of the MC.

Caroline knows all about masks. As a therapist, she's trained to see through the walls people build-partly because she spent years building her own to survive a dark past. She's the one woman tasked with reassembling the shattered pieces of Colt's mind, but she didn't count on a man who burns as hot as he does.

But as the lines between doctor and patient blur into a forbidden obsession, the ghosts of the past refuse to stay buried. When the remnants of Xtinction catch wind of his new weakness, Caroline finds herself squarely in the crossfire.

Colt might be broken, but he's never been more dangerous. And if they touch her? They'll find out exactly how he earned his name.

Buckle up for a gritty, forbidden romantic suspense featuring a tortured SGT at Arms who will burn the world down to keep his woman safe.

Serpent Sinners is a romantic suspense series where each book furthers the stakes but follows a different couple. They are best enjoyed in order.

***All of Iris' MC series are in a shared universe, including Midnight Saints, Quarter Kings, and Lords of the Underground.***

• Format: Paperback
• Language: English
• ISBN: B0H8FYTXH3
• ISBN13: 9798186727347
• Release Date: July 2026
• Publisher: Independently Published
• Length: 330 Pages
• Weight: 0.72 lbs.
• Dimensions: 0.7" x 5.0" x 8.0"