The Ghost Who Saved Us by A.D. Ellis

Brock is content with his successful construction business in the small town of Prairie Brook. The local dating pool for a gay man is basically a puddle, but he’s mostly happy with his life. However, Brock’s easy, somewhat lonely life is in for a shake-up when he comes face-to-face with a man he’s never quite forgotten.
Calder ran from Prairie Brook several years ago. At the time, he convinced himself he was running toward a fabulous job and bright future. Now, after wasting years of his life at a job that went nowhere—and spending years getting to know himself better—Calder can admit he’d been running from unwanted feelings and a man he never truly pushed from his mind.
Brock and Calder both bid on a job at the rumored-to-be-haunted Prairie Brook Mansion only to find themselves smack dab in the middle of a tragic, romantic ghost story and their own second chance romance.