As the leader of Knight Security and the handler of all four special operative teams, Hunter Hall's life revolved around bringing order to a world of chaos. After growing up in a military family, Hunter followed in his father and brother's foot steps, sharing the same passion for issuing punishment to those who brought harm to others. With a permanent scowl and hard exterior, Hunter is all work and no play, with very little patience or desire for love and nothing could change that - or so he thought.

Marcus Cordell is the largest, most intimidating member of Bravo Team at Knight Security. With a massive muscular build and a permanent scowl, Marcus is the definition of the strong silent type. But when the ghosts of his painful past resurface, will he be able to maintain the tough exterior that he's built around his heart or will he melt into the man he once was before his world was torn apart.

Caleb Tanner is a unique combination of both killer and savior all wrapped into one. As a former Navy Seal and medic, Caleb has the ability to both take life and restore it with ease, making him a vital member of Bravo Team at Knight Security. He would kill or be killed for his teammates and the women they love, earning him the reputation of both fearsome warrior and compassionate caregiver. When a new job assignment flares every protective instinct within Caleb, he is fully prepared to step in as a knight in shining armor, but what if his new assignment, Elaina Flores, has no interest in being saved?

Pierce Lockland's reputation as a playboy and all around ladies man is hard earned. With a massive muscular build and a panty-dropping smile, Pierce looks more like a male model than a former Marine sniper, but that doesn't make him any less lethal. As a member of Bravo Team at Knight Security, Pierce is a trained killing machine, but making enemies for a living doesn't go without consequence. His arrogance is justified by his kill count and he fears no enemy, but the demons of his past may have found his only weakness and her name is Natalie Hart. (This is the second book in the Knight Security Series, but can also be read as a stand alone)

Declan "Boss" Packard is dominating and powerful, with a deep need for control. Being the leader of a Special Ops team at Knight Security, his missions are priority and his teammates are his life. The word "love" has never been a part of Declan's vocabulary and he has never been interested in romantic bullshit, but Lexi Bradshaw changes that in an instant. Lexi awakens every protective and possessive fiber of Declan's being, but when her past returns to haunt her can Declan surrender his need for control in order to save her life?

Revenge. I'm familiar with it. You have to be when you're the firstborn son of a notorious mafia leader. Death and vengeance have been the very foundations of my life. So who in their fucking mind would be stupid enough to cross me? My brother and I have been wrongfully convicted of a crime we didn't commit. We know who is behind this. We bid our time behind bars, planned and prepared for the day we got out. Now we're free and hungry for redemption. I know what must be done. I know whose blood will be spilled. But before I go after him, I'll go after his daughter. I never said I play fair. *Book one in the Marino Brothers Duet. Rated 18+ due to explicit language, sex, and violence.*