The Jungle by Upton Sinclair is the ultimate muckraking novel, so ultimate that it constitutes the very definition of the term Muckraking.
This book describes all the great evils of society in 1906, starting with the child marriage of a girl not yet 16 to a much older man, then unsafe working conditions resulting to accidents and deaths, people who die because they cannot afford to pay a doctor, people who die of food poisoning because they eat unsafe meat.
Men who abandon their families.