The encyclopedic novel is a literary concept popularised by Edward Mendelson in two 1976 essays ("Encyclopedic Narrative" and "Gravity's Encyclopedia"). In Mendelson's formulation, encyclopedic novels "attempt to render the full range of knowledge and beliefs of a national culture, while identifying the ideological perspectives from which that culture shapes and interprets its knowledge". He states that "[b]ecause they are the products of an epic in which the world's knowledge is larger than any one person can encompass, they necessarily make extensive use of synecdoche". Other qualities include "the full account of at least one technology or science" and the display of "an encyclopedia of literary styles, ranging from the most primitive and anonymous levels ... to the most esoteric of high styles". Key to Mendelson's definition is the proximity between the era portrayed in the novel and the era of the novel's writing (as in, for example, James Joyce's Ulysses, and Thomas Pynchon's Gravity's Rainbow). In more general terms, the encyclopedic novel is a long, complex work of fiction that incorporates extensive information (which is sometimes fictional itself), often from specialized disciplines of science and the humanities. Orderly plot structures are often absent.
There has been considerable debate about the nature and function of the encyclopedic novel since Mendelson's exposition of the concept. Hillary A. Clark attributes to this type of discourse the importance of ordering the information which the writer discovers and retrieves. Moreover, Clark points out that encyclopedic texts have a long history, from the Renaissance Divine Comedy of Dante to Ezra Pound's modernist The Cantos. She explains that the urge to order the sum of all knowledge grew exponentially during the Renaissance and that by the 20th century we see writers such as Pound and James Joyce (whose Finnegans Wake is an example of an encyclopedic novel) simply recycling narratives. The encyclopedist's essential job regardless of the type of discourse, is to gather, recycle, and restate. The encyclopedic writer "returns to the role of the medieval scribe … reading and copying the already known, the popular, as well as the esoteric," and hence the encyclopedic novel assumes an almost "anti-creative" function.