Book II: The Billionaires Mind
Katelynn is missing Nate, the man she fell in love with while working for his father's company, while he's dealing with aftermath of his father's heart attacks back home, but when Nate returns to North Platte to be with her again, some strange circumstances begin to make her feel like something about their love isn't right. They seem to be going in the right directions, though, and before long they're thinking about marriage, and discussing what comes after.
However, things are not always what they seem, and when Katelynn is presented with what appears to be proof that the man she loves is no better than the lowest scumbag, that he'd resort to terrible things to get what he wants, she decides that she was wrong about him, and chooses to take drastic action to end their relationship.