The Call of the Wild is a novel by American writer Jack London published in 1903. One of the top classic books, the plot revolves around a previously domesticated dog named Buck, who is stolen from his home in the Santa Clara Valley of California and taken to the Alaskan gold fields to be a sled dog in the Yukon during the 19th-century Klondike Gold Rush, in which sled dogs were bought at generous prices. Passed from owner to owner, his primordial instincts return. He eventually finds a kind master, John Thornton. One night, Buck returns from a short hunt to find his beloved master and the others in the camp have been killed by a group of Yeehat Indians. Buck eventually kills the Indians to avenge Thornton. After realizing his old life is a thing of the past, Buck follows a wolf into the forest and answers the call of the wild. The Call of the Wild is London's most popular book and is generally considered his best. Because the protagonist is a dog, it is sometimes classified as a juvenile novel, suitable for children, but it is dark in tone and contains many cruel and violent scenes.