I got DK's book in 2005 and was captivated by his story, though I did detect some - how shall I put it kindly - 'dramatic licence' at times (e.g. how could he scoff all that pizza, cheesecake and coffee in one go while running a personal ultra, when he's only used to eating salmon?). I did find "The Soiling Of The Lexus" hilarious, though, and I don't usually laugh at others' misfortune.
I was sufficiently inspired to have a go at Western States in 2006 (the sauna year), where I actually got to shake hands with Da Man. See photo 29 in the 2006 Western States pictures in the following link:
http://www.flickr.com/photos/26082075@N05/sets/
Having completed the race, dramatic licence was confirmed unequivocally. Nonetheless I still find UM an inspiring read, having read it three times at least.