In addition to the sources suggested above, if one wishes to obtain critical essays of quality upon aspects of The Jungle--even in comparison to other such works--he/she can also turn to the Reference section of the library and seek such essays in the Contemporary Literary Criticism volumes. This collection of literary analyses is boundless, offering a wide variety of critical approaches by learned writers. Each volume contains an Index, and there is also a general Index to aid in the location of essays. Certainly, the use of these references books is of the quality needed for the student in the college setting. Since The Jungle, by Upton Sinclair is also a novel that crosses into social criticism, there should be ample essays, too, upon an aspect of the novel that touchess social issues. However, there are dangers in obtaining social criticisms. For example, an article from American Studies by social historian Louise Caroll Wade, contends that the novel is only mildly worthy as a historical novel. She states that since Sinclair was a Socialist,
...he "loaded the dice" by ignoring "how millions could consume Chicago meat without ill effects." The demise of the Rudkus family is far-fetched, given the statistically improbable series of disasters that befall it within a few years' time.
Nevertheless, Wade does concede that The Jungle raises questions on many worthy issues. Fianlly, there are four or five criticisms of Sinclair's work on enotes. She the enotes link below.