On one level, "The Jungle" is a gritty investigation into the meatpacking industry. On another, it is a serious book of the times, challenging the policies and beliefs of our political organizations at the beginning of the century. This is one of the first American social protest novels. This concise supplement to Sinclair's "The Jungle" helps students understand the overall structure of the novel, actions and motivations of the characters, and the social and cultural perspectives of the author.