He's a bodyguard with an alpha mentality. They call him intense and stealthy. She calls him off-limits. We call him Mercer Bryant. Mercer Bryant made a promise-one he intends to keep-even if it kills him. He would do anything for his partner. Keeping secrets and fulfilling promises goes with the territory. His current mission: discreetly protect Quinn Sullivan at all costs. As a former CIA operative, Mercer knows his way around violent and undercover operations. Protecting the independent and fiery Quinn keeps him on his toes. But, she wants nothing to do with him or his mission. Hellbent on keeping his promise, Mercer takes on the enemies responsible for his partner's disappearance-but there is more on the line. Keeping Quinn safe means letting down his guard and letting her into his heart. Suddenly, Quinn sees Mercer for more than just the man next door. Now, she needs to accept that there is only one man to keep her alive: Mercer Bryant. While each book in the Butler Ranch series is a standalone with its own HEA, they may be more enjoyable read in order.