When carefree musician Elizabeth "Elle" Blackman discovers someone has been in her apartment just days before she's set to go on tour, she makes the only sensible choice there is. She runs right to the front door of Cunningham Security, where the owner is not only the man capable of keeping her safe, but also the guy she's crushed on for months.

She's a nurse longing for love. He's a man who lives life in the fast lane. Conflicting schedules and stubborn personalities lead to misunderstandings and disputes. But sizzling chemistry keeps them coming back for more.

Royce Blackstone has one rule: Never get personally involved with his clients. As the owner of Harper Security Ops, Royce is well aware of everything and everyone inside his building. When he’s about to go in after the biggest lead on latest case that’s landed on his desk, Royce didn’t expect he’d have to abort the mission early. It might have seemed like Tarryn Hendrix was simply looking to learn some new skills, but dedicating two years of her life to training her mind and body is all part of Tarryn’s plan.

Protected. That’s how Kaia Banks spent the better part of her childhood. Raised by an abusive father, Kaia relied on her older sister to keep her safe. But Kaia’s all grown up now. And when her relationship places her in the line of fire, Kaia takes matters into her own hands. Remi Archer is no stranger to surprise. As part-owner of Archer Tactical, it’s his job to prepare himself and others for unpredictable situations. Unfortunately, no amount of training will prepare him for Kaia. When the gorgeous woman requests he train her, Remi can’t say no.

As the lead singer of a wildly popular industrial rock band, Cash Morris has never had to work too hard when it comes to women. So when he walks into a small-town New Hampshire hotel and spots the manager, he expects her to do the same. Demi Stokes has seen enough deception to last a lifetime and has written off the possibility of ever getting serious with someone for good. Cash, the rock star with killer good looks, an incredible voice, and playboy ways is the very definition of what she intends to steer clear of. But Cash is used to getting what he wants.