This atlas's largest single source kind by far: collaboratively edited online encyclopedia entries, principally Wikipedia, cited for author biographies, plot and character summaries, genre and movement definitions, and background on literary history. Belongs here: any citation to a live, publicly editable encyclopedia article. Does not belong here: a citation to Encyclopaedia Britannica, tracked separately as a named general-reference encyclopedia rather than a collaboratively edited one, or a peer-reviewed academic source, each carrying different evidentiary weight than a crowd-edited page.