I was inspired to buy this book after seeing Sean Penn's amazing film. At the beginning I thought it was just going to underline how faithful Penn's film is to the book, but Krakauer does give a lot more background to the McCandless saga, which is really fascinating.
I really enjoyed the quotations at the beginning of each chapter, some of which have introduced me to new authors like Anthony Storr. Krakauer also weaves in accounts of other idealistic young adventurers, which gives a useful perspective. He has also his own dramatic story to tell, which he does in a very understated way.
The subject matter is extremely absorbing and Krakauer writes beautifully and tells the story at beguiling pace. He quotes the story of Everett Ruess by means of comparison, and he quotes how Everett Ruess's father mused after his son disappeared in the desert, "The older person does not realize the soul-flights of the adolescent. I think we all poorly understood Everett."
The amazing bravery and foolishness of McCandless that reminds us of our own adolescent soul-flights, and how, beneath our exteriors, we have so much yearning and anguish.