If you haven't read this book then on the basis of what I've covered so far you are missing out.
The basic narrative is the story of him and a buddy walking the Appalachian Trail, which is a hardcore long distance footpath and covers over 2000 miles up the East coast of America from Georgia to Maine.
Last night, I read the funniest paragraph I have ever encountered; so much so that I couldn't read it out loud to my wife for about 10 minutes. Suffice it to say that I shall never think of a kid's paper birthday streamer in the same light ever again.
A very informative and funny read (which is classic Bryson) and I commend it to the forum.