From Here to You by Jamie McGuire

As Darby Dixon sits in a tiny Texas church bathroom on her wedding day holding a positive pregnancy test, she realizes that of all the bad decisions she’s made in her life, marrying her abusive fiancé would be the worst. She’s never been able to stand up for herself, but she’ll sure as hell stand up for her baby. With just the cash she has on hand, she runs to get a bus ticket to the farthest place she can afford. Between her sheer grit and pageant-queen smile, she lands a job as a front desk clerk at the Colorado Springs Hotel. It’s not a glamorous life, but she and her baby are all that matters.

A former Marine, Scott “Trex” Trexler has worked in the most dangerous, corrupt, war-torn places on earth. Now he finally has a chance to return to the last place he’d felt at peace–Colorado Springs, Colorado, to take a new job with the Cheyenne Mountain Complex, a top-secret military installation buried deep within the granite.

The moment Trex walks into the inn, Darby knows he’s dangerous. There’s no way she wants to get involved with another man who seems to be keeping way too many secrets. As charming and devastatingly gorgeous as Trex is, he clearly isn’t telling her everything. But as wildfires rage on the mountain and Darby’s ex-fiancé shows he isn’t so willing to let her go, both she and Trex are soon to find out that what you don’t know absolutely can hurt you.