I highly recommend "A Walk in the Woods" on CD, read by the author Bill Bryson. I didn't like his voice at first, but it grew on me, and by the end of the book, I couldn't imagine anyone else reading it.
His "Short History of Nearly Everything" is a great book too.
OMG... not really a dog story but flat out the funniest book I've ever read. Was reading it on the treadmill at the gym and was cracking up.... the woman on the treadmill in front of me turned around (maybe she thought I was laughing at her?) and saw the book.... Her face lit up.... "I understand" she said.