One of my two favorite books. (The other is To Kill a Mockingbird.) I read this three summers in a row as a teenager, and probably another three times as an adult. And if I live long enough I will read it as many times again. It's simply the greatest survival story ever. I would read this book on camping trips in 90+ degree temperatures, and it would never fail to whisk me away to the Andes.
Here are my only two complaints.... First, I always skip the first chapter, which concerns the history of Uruguay, a description of rugby, and a history of Uruguayan rugby. These details are unnecessary and just delay the real story. Also, I could do with fewer accounts of the families' attempts to locate the survivors with the help of a psychic. These passages do at least let us spend some time with the families and let us know what they're going through, but of course the psychic accomplishes absolutely nothing and doesn't have a clue where the survivors are. Every time we visit the families and the psychic we are being taken away from the real story.
But these flaws are minor and do nothing to lessen the amazingness of the story.