The People of the Abyss (1903) is a book by Jack London about life in the East End of London in 1902. He wrote this first-hand account after living in the East End (including the Whitechapel District) for several weeks, sometimes staying in workhouses or sleeping on the streets. In his attempt to understand the working-class of this deprived area of London the author stayed as a lodger with a poor family. The conditions he experienced and wrote about were the same as those endured by an estimated 500,000 of the contemporary London poor. London also used the expression "the people of the abyss" in his later dystopian novel The Iron Heel (1907).

A classic non-fiction work which describes the struggle for survival by the working class during Jack London's day and age.

The story begins before the wolf-dog hybrid is born, with two men and their sled dog team on a journey to deliver the coffin of Lord Alfred to a remote town named Fort McGurry in the higher area of the Yukon Territory. The men, Bill and Henry, are stalked by a large pack of starving wolves over the course of several days. Finally, after all of their dogs and Bill have been eaten, four more teams find Henry trying to escape from the wolves; the wolf pack scatters when they hear the large group of people coming.

The story then follows the pack, which has been robbed of its last prey. When the pack finally brings down a moose, the famine is ended; they eventually split up, and the story now follows a she-wolf and her mate, One Eye. The she-wolf gives birth to a litter of five cubs by the Mackenzie River, and all but one die from hunger. One Eye is killed by a lynx while trying to rob her den for food for the she-wolf and her cub; his mate later discovers his remains near the lynx's den. The surviving cub and the she-wolf are left to fend for themselves. Shortly afterward, the she-wolf kills all the lynx's kittens to feed her cub, prompting the lynx to track her down, and a vicious fight breaks out. The she-wolf eventually kills the lynx but suffers severe injury; the lynx carcass is devoured over a period of seven days as the she-wolf recovers from her injuries.