Plummet To Soar by Z.A. Maxfield

Feckless, luckless, and charming, Mackenzie Detweiler is the author of a self-help book one reviewer calls “the most misbegotten motivational tool since Mein Kampf.” He’s maneuvered himself into a career as a life coach, but more often than not, his advice is bad. Really bad.
It’s even getting people hurt… and Mackenzie sued.
It falls to Mackenzie’s long-suffering editor, JD Chambers, to deliver the bad news. He chooses to do so face-to-face—to see if the spark he senses between them is real when they’re together in the flesh. Unfortunately, a snowstorm, a case of nerves, a case of mistaken identity, and finally a murder get in the way of a potential enemies-to-lovers romance.
There are many, many people who have good reason to want Mackenzie dead. JD must find out which one is acting on it before it’s too late for both of them.