Fatal Encounter by Jannine Gallant

He writes thrillers—she lives them.
Recruited as a sniper by Counterstrike, a covert team who rescues kidnap victims, former Olympic biathlete Jaimee Fleming fills the void created by her tragic past with dedication and purpose. But when one of their own is killed, she is shattered by the loss and leaves the agency. Thankfully, her new life as a dog walker offers no high-stakes danger—until she witnesses a murder.
Best-selling novelist Eli Croft doesn’t court danger—he only writes about it. But when his grandmother, the matriarch of the wealthy Croft family, is found dead, he suspects one of his relatives hired the assassin. On a mission to uncover the killer’s identity, Eli encounters Jaimee, running for her life . . .
Jaimee fears relying on the charming and persuasive Eli could be a fatal mistake. But Eli is hard to resist, and the two join forces. With the help of her former Counterstrike teammates, Jaimee and Eli must stop a murderer before she becomes the next victim. If she lives long enough, will Jaimee let go of her past and trust Eli with her future?