Drive Me Crazy by Samantha Chase

One car. Two strangers. Infinite possibilities.

Grace Mackie is having the worst day.
Finding out her fiancé only proposed for the sake of a promotion is one thing. But discovering he’d also knocked up his assistant? There’s no coming back from that. Desperate to escape her own destination wedding, she’ll do just about everything to get back home and put the whole mess behind her. Even driving cross-country in a rental car.

Finn Kavanaugh’s day is even worse.
What had started as a brother bonding trip has now left him stranded three thousand miles from home without a car or credit card. Because his brother took off with both. So much for bonding, right? As much as he might want to throttle his brother, he first has to find a way to get home. His only option? A rental car and a cross-country trek. Neither of them expected their trip would come complete with a surprise passenger. But desperate times and all that.