I read this book when I was a boy, loved it, and still love it now. The nerve-wracking sense of suspense with the ups and downs that Brian learns throughout the story really helps the reader connect with him. I kept imagining what I would do if I was in Brian's situation. Sometimes I think it would be fun to be lost in the wilderness and see if I could survive, but Brian's adventure gives you a good idea about the harsh realities that come with being alone in the wild. Alone.
In addition to Brian surviving in the wilderness, it's also a very deep book because he deals with his parents' divorce. He also develops a sense of identity in his survival. He basically becomes a man in a span of two months and it is great fun to be a part of his journey.
P.S. - I watched the made-for-tv movie made called "A Cry in the Wild". In my opinion, it did not do the book justice and missed the character development that was the best part of the story.