Jungle by Upton Sinclair

When it was first published in 1906, The Jungle exposed the inhumane conditions of Chicago’s stockyards and the laborer’s struggle against industry and “wage slavery.” It was an immediate bestseller and led to new regulations that forever changed workers’ rights and the meatpacking industry. A direct descendant of Dickens’s Hard Times, it remains the most influential workingman’s novel in American literature.