Out of Sight by Elmore Leonard

Leonard is a master and this is him at his best. Other than a weak ending this book is outstanding. PW: World-class gentleman felon Jack Foley is busting out of Florida's Glades Prison when he runs head on into a shotgun-wielding Karen Sisco. Suddenly, he's sharing a cramped car trunk with the classy, disarmed federal marshal, and the chemistry is working overtime - and as soon as she escapes, he's already missing her. But there are bad men and a major score waiting for Jack in Motown. And the next time his path crosses Karen's, chances are she's going to be there for business, not pleasure.