Jack London 
The People of the Abyss [EPUB ebook] 

“The People of the Abyss” is a book by Jack London, an American novelist. A pioneer of commercial fiction and an innovator in the genre that would later become known as science fiction.
The People of the Abyss (1903) is a book by Jack London made up of his firsthand account of life in the East End of London. George Orwell was inspired by The People of the Abyss, which he had read in his teens. In the 1930s, he began disguising himself as a derelict and made tramping expeditions into the poor section of London. The influence of The People of the Abyss can be seen in Down and Out in Paris and London and The Road to Wigan Pier.