He's a former Marine with an undercover mission. He's an alpha with a dangerous vendetta. They call him fearless and frightening. Fatale calls him dangerous and desirable. We call him Kade Butler. When M16 agent Merrigan "Fatale" Shaw rescues the presumed dead Kade Butler from captivity, all he wants is to avenge the enemies who threaten his family. Teaming up, Merrigan and Kade search for hidden documents that will expose everything. As peril intensifies and the Russians close in, their desire ignites. Torn between passion and duty, Kade and Merrigan are determined to protect their hearts. Will Merrigan realize there is only one man she'll risk her entire career for: Kade Butler? Her mission was clear: go undercover to infiltrate a Russian organization. But when the MI6 agent discovers that two former CIA operatives are being held captive, rescuing them becomes paramount for her. While each book in the Butler Ranch series is a standalone with its own HEA, they may be more enjoyable read in order.