My absolute favorite of Bryson's books- and I love a lot of his work.
You just cannot beat the humor of his sidekick, Katz. The situations in which these two adventurers find themselves in on the trail and in these tiny America towns often made me laugh out loud. It was the perfect foil for the sections in the book where he lays out facts and biting commentary about nature, the National Parks system, and Americans.
I even read it with my 13 year old son and the humor and touching friendship that the two hikers developed sustained him through the other parts of the book that were a bit over his head.
This book is on my top 50 books.