Hit and Run by Lawrence Block has a very interesting plot. It is about a hit man who has $2.5 million in stocks and municipal bonds, who is ready to retire. He goes around the country killing people and collection stamps.
He just has one more hit, in Iowa of all places. The night before he does the hit, a presidential candidate is assassinated in the same state. He then discovers that he has been set up as the prime suspect. He has almost no cash and no usable credit cards. So now what does he do?
Hit and Run is a real page turner, and you will find yourself rooting for the bad guy. If you need a book to occupy yourself on a flight, this is it.