Hawkeye series by Sierra Cartwright (1~3)

Born in Northern England and raised in the Wild West, Sierra Cartwright pens book that are as untamed as the Rockies she calls home.
She's an award-winning, multi-published writer who wrote her first book at age nine and hasn't stopped since.
Sierra invites you to share the complex journey of love and desire, of surrender and commitment. Her own journey has taught her that trusting takes guts and courage, and her work is a celebration for everyone who is willing to take that risk.

Genre: Erotic Romance

Danger Zone: "Who's watching you...?"
The highly specialized Hawkeye team protects the world's most valuable things, secrets, even people. But now one of their own needs protecting. There's a cool million dollar bounty on Dom Wolf Stone's head. Trouble is, Stone's a loner and doesn't want the help.
That doesn't stop his submissive and former lover, Nate Davidson, or another determined agent, Kayla Fagan, from showing up at his Colorado ranch, uninvited. The spark, the anger, the hurt is still there between Wolf and Nate, and their first kiss reignites the flames that time and distance have not diminished. With Nate's help, Wolf uncovers Kayla's unexplored submissive tendencies. Under the Dom's unyielding instruction, Kayla explores her sexuality in ways that make her dizzy.
For Wolf, there's nothing better than having two very different, very willing, very pleasing subs at his command. But Kayla and Nate both want more. In addition to his love, they want him to give up control long enough to share his life completely. And that's the one thing Wolf is incapable of giving.

Bend Me Over: Tall, dark, handsome, and oh-so dangerous.
That's Trace Romero, Aimee's new bodyguard. Aimee has no desire to share her home with anyone, especially a Hawkeye operative who invades her space and thoroughly dominates her.
If it were up to him, Trace would be in a South American jungle, mixing it up with bad guys instead of playing bodyguard to the uptight college professor who makes him anything but welcome. But when he finds a stash of her BDSM novels, protecting the professor’s body suddenly gets more interesting.
Aimee would send him on his way, if her sister weren’t so concerned about the break in at her house, and if she hadn’t threatened protective custody. But protective custody might have been slightly less overwhelming than Trace demanding her complete capitulation, mind and body, and more -- her total trust. But that trust may be the only thing standing between her and a madman determined to kill her.

Make Me: Competent and in control, Ms. Inamorata, Hawkeye's righthand woman, has the perfect relationship with hunky fellow operative Wesley Lowell. Several times a week, she shows up at his house, has fabulous sex, meaningless conversation, and then returns home and to her regular life. Dynamic and determined, Wes has had enough. He's tired of playing by her rules. He wants more than passion from Inamorata, he wants commitment. One evening, as she's yet again climbing from his bed to leave him in the middle of the night, he acts, snagging her wrist and refusing to let her go. He bends her over the bed, and takes her the way he wants to: hard, fast, dominating. Against her own wishes, she responds to his more heated sexual demands. For the first time since they've been together, he makes her beg for an orgasm, and beg she does. This oh-so-sexy man turns her life upside down, until she realizes she needs him not only as a demanding lover, but needs him by her side to solve a case that causes past and present to collide