Well Chris, I would have to recommend my book for two reasons:
1. It is reasonably current, as much as I like Bryson's work, it is becoming a bit dated. It's a hoot to read, but doesn't contain much actual information on preparing for the hike, it is a better guide as to what not to do.
2. Unlike Bill Bryson, I did actually finish in 2008. It took me two years (180 days) to finish because I had to hop off the trail for 300 days to recover from heart surgery, so that put a dent in my thru-hike plans.
I would also recommend Skywalker's work too, it is a fun read and he is really approachable if you have questions. I can put you in touch with him if you wish. He also has just finished a book about his PCT hike called
HIGHS AND LOWS ON THE PACIFIC CREST TRAIL.
My book is
THREE HUNDRED ZEROES: Lessons of the Heart on the Appalachian Trail. I took three hundred zero days for the surgery, hence the title. The subtitle has to do with the fact that I carried my brother's Purple Heart Medal with me on the hike. We promised each other we would do the trail when we finished our military duty, but his was killed in Vietnam, so that never happened.
No matter what you read, good luck on the hike, keep us posted and don't be afraid to ask for, and in some cases, listen to, advice.
Good Luck
Dennis "K1" Blanchard
AT 07/08