Echo Burning (Jack Reacher #5) by Lee Child

Hitching rides is an unreliable mode of transport. In temperatures of over a hundred degrees, you’re lucky if a driver will open the door of his air-conditioned car long enough to let you slide in. That’s Jack Reacher’s conclusion.

He’s adrift in the fearsome heat of a Texas summer, and he needs to keep moving through the wide open vastness, like a shark in the water. The last thing he’s worried about is exactly who picks him up.

He never expected it to be somebody like Carmen. She’s alone, driving a Cadillac. She’s beautiful, young and rich. She has a little girl who is being watched by unseen observers. And a husband who is in jail. Who will beat her senseless when he comes out. If he doesn’t kill her first.