Jack London & Alexander Masters 
People of the Abyss [PDF ebook] 

In 1902, Jack London purchased some secondhand clothes, rented a room in the East End, and set out to discover how the London poor lived. His research makes shocking reading. Moving through the slums as one of the poor; eating, drinking, and socializing with the underclass; lining up to get into a flophouse, London was scandalized and brutalized by the experience of living rough in Britain’s capital. His clear-eyed reflections on the iniquities of class are a shaming testament to the persistence of social inequality in modern times.