Instruct: Classify a review as either positive or negative.
Query: One of the best books about nature ever written

This is the first thing written by Jack London that I read. At the time, I was in elementary school and I checked it out from the middle school library when we were on an orientation visit. I found it so interesting that I proceeded to read everything of his that I could find. London's expression of events from the perspective of the dog and the innate killer instinct of Buck combine to make an accurate story about nature, the kill or be killed reality of survival.Yet, Buck is also capable of great love, his actions when he is with Thornton expresses the best traits of a domesticated dog, loyalty, courage and intelligence. Buck defends Thornton when attacked, rescues him from a watery death and engages in simple affectionate play. A true classic of American literature, this is a book that all children should read. Now that I have rediscovered London, I am on a hunt for his other writings.