"The Abysmal Brute" is a novel by American writer Jack London, first published in book form in 1913. It is a short novel, and could be regarded as a novelette. In the story, a successful boxer, who was brought up in a log cabin and knows little of the real world, begins to realize the corrupt practices in the game of boxing. (Goodreads)
John Griffith London (born John Griffith Chaney; January 12, 1876 – November 22, 1916 was an American novelist, journalist, and social activist. A pioneer in the world of commercial magazine fiction, he was one of the first writers to become a worldwide celebrity and earn a large fortune from writing. He was also an innovator in the genre that would later become known as science fiction. (Wikipedia)