It begins, as some of my favorite books do, with an obviously dumb proposal. Matt is talking to a friend in a bar. The friend has a foolproof plan for a kidnapping. He just needs Matt to be the driver. Matt knows this friend is an addict and even when sober is incapable of making rational decisions. So of course Matt turns him down.
But Matt has money problems and other problems that come with being a single parent. The parents of his late wife think his daughter would be better off with them. The pressure on Matt builds. He runs out of options and decides he may as well take a chance on his friend's plan.
From there on, it's not a question of if something will go wrong but of when, and what the consequences will be, and how far Matt is willing to go to survive them.
Much of the pleasure in reading this book comes from its perfect construction. Each complication plays out just long enough, the next one comes along just in time to boost the tension, and it's usually something we didn't see coming but makes sense once we've seen it.
Given the hero's compromises, we know the ending won't be sunshine and puppies. It's a question of how dark the shad of gray will be. This is a very satisfying crime novel.