Run, by Blake Crouch

Run is quite a thriller.  It starts off fast and keeps moving throughout the book, just like the family in the book who are running for their lives.  I thoroughly enjoyed Run and it's one of only a handful of books that were literally hard to put down.  Crouch has a great sense of pacing--just when you don't think you can take any more stress and horrors for the family, Crouch lets up and give you a breather.  Just when things get comfortable and the plot starts to drag--just a little--Crouch ramps things up again.

Crouch's style is perfect for this novel.  It's told very close in to the father's and mother's perspectives and almost has a claustrophobic feel.  He also uses fragment sentences which adds to the off-balance feel to the novel and gives a sense in the reader of also being on the run.

Run is a perfect demonstration of Ayn Rand's rule of fiction:  make things as difficult as possible for your protagonists.  Crouch succeeds in this mission without straining plausibility, and in the process has created a very satisfying thriller.