Books like Secret Agent Affair by Marie Ferrarella

Arson investigator Ryan Piasecki meets businesswoman Natalie Fletcher when a suspicious fire hits Fletcher Industries, igniting a tense partnership and a blaze of chemistry.

An unexpected reunion . . . Kira Duval was part of a Special Forces team that got caught in an ambush -- leaving only two wounded survivors: herself and Weapons Sergeant Garret Fleming. Losing her team was traumatic, and in the chaotic aftermath, as the Army moved them from hospital to hospital, she lost Garret too. But she never lost her secret yearning for him. Finally, she gave up trying to track him down back in the States. But as she settles in at the Bar C cattle ranch in Wyoming, a place where veterans can find a home and a place to heal, she's introduced to her sandy-haired, hazel-eyed housemate: none other than Garret Fleming. They're a long way from Afghanistan -- and a long way from the people they used to be before tragedy changed their lives. But as Kira earns her keep by caregiving for the ranch owner's bedridden, alcoholic father -- a task that sometimes feels more challenging than any black ops mission -- she finds that even in peacetime Garret still has her back, and that in this warm, welcoming place, the passion she resisted in the heat of battle may finally have a chance to flouish . . .

When Elizabeth Shelton discovers her boss is murdered, she is stunned to learn she is pregnant by his son. With a killer on the trail, Whit Adair turns from former lover into her protector, risking everything to keep both mother and child safe.

Detective Cole Baker’s protectiveness toward Dr. Nika Pulaski turns to danger when a series of hospital deaths points to her. In this romantic suspense, Cole must decide if Pulaski is a healer or a killer.

When an inappropriate man... He makes her uncomfortable. Edgy. But as strange accidents befall Lilith Mercer and Tony Alvera becomes her bodyguard, she realizes that her wariness of the street-rough, enigmatic, younger Redstone operative covers an all-consuming attraction. Soon, hiding her feelings becomes next to impossible. ...becomes an irresistible lover No one could protect Lilith better than Tony. Maybe he'll never be good enough for the classy executive, but he trusts her safety to no other. Then one explosive night changes everything between them--and to save Lilith, Tony must go back to the streets and expose secrets that may forever set them apart.

Computer genius Ryan Barton enlists the help of former flame Sasha Tereschenko, a missing‑children expert, to rescue his sister from an online predator, forcing them to confront a risky past romance.

(The Doctors Pulaski #1) Medical personnel were dropping like flies and Dr. Sasha Pulaski wasn't going to just stand by and do nothing. She believed in her work and would do anything for her patients. But how could she help when she was next on a murderer's hit list? The only bright spot was her new protector-- Detective Anthony Santini, a man determined to catch the hospital killer and watch over Sasha. And when the building was in lockdown mode, she turned to the handsome lawman--and found more than just a strong guardian angel. Could he help her see the unspoken possibilities sizzling between them before it was too late?

She was a suspect in his investigation...but Redstone employee Kate Crawford was also the most captivating woman securities expert Rand Singleton had ever known. Despite the protective feelings she stirred, he couldn't reveal his true identity. He'd been sent to do a job. Getting emotionally involved with the vulnerable beauty wasn't an option. Kate could think of only one reason why an enigmatic, charm-oozing man like Rand was in town -- he was up to something. And she had too much at stake -- professionally and emotionally -- to fall prey to a seductive stranger's schemes. Still, with Rand's knee-weakening caresses wreaking havoc on her heartstrings, would she be able to expose his secrets before he uncovered hers?

Witt von Kreus, a Lazlo Group agent, trades justice for love when he meets Marina Bond, an undercover SIS operative tied to a dangerous Lazlo plot. Their forbidden romance ends with bullets and a promise to keep her safe, even if it means binding her forever.