Out of Nowhere book by Sandra Brown

 At a Texas county fair, children’s book author Elle Portman is enjoying a rare night out with her favorite cowboy: her two-year-old son, Charlie. But just as they’re about to head home, the unthinkable happens: a shooter opens fire into the crowd, causing widespread panic to erupt all around them. Also caught in the melee is corporate consultant Calder Hudson. When he wakes up in the hospital, he's told he's lucky. Others didn't fare we well, which instills in Calder a furious determination to get justice.

A chance encounter with Elle at the police station leads to a surprising gravitation to one another. But even as the attraction grows, Elle and Calder can’t help but wonder if the unimaginable tragedy that brought them together is too painful to bear—especially while the shooter remains at large.