What book brought to light the abuses in the united states meatpacking industry in the early 20th century?

The book that brought to light the abuses in the united states meatpacking industry in the early 20th century is the Upton Sinclair’s the jungle book. The book jungle is written in 1906 by Upton Sinclair which is an american journalist and novelist. Sinclair composed the novel to describe the exacting circumstances and demoralized lives of settlers in the united states in Chicago and alike developed cities. On the other hand, most readers were more apprehensive with his revelation of health violations and unsanitary activities in the american meatpacking industry throughout the early 20th century importantly donating to a public outcry which ran to improvements as well as the meat inspection act.