Who wrote white fang and what is the story about?

White Fang is a novel by American author Jack London (1876–1916) — and the name of the book's eponymous character, a wildwolfdog. First serialized in Outing magazine, it was published in 1906. 

This adaptation of Jack London's wilderness tale focuses on young Jack Conroy (Ethan Hawke), who has arrived in Alaska to search for a gold mine. When Jack encounters White Fang, a dog/wolf hybrid who has been cruelly treated by his owner, Beauty Smith he rescues the canine from the jaws of death during a fight with a fierce bulldog. Aided by his friend Alex Larson Jack nurses White Fang back to health, and the animal becomes a close companion to the men.