Epistolary fiction

Epistolary novels
Epistolary short stories
Epistolary stories
Novels, Epistolary
Novels in letters
Short stories, Epistolary

Diary fiction.

Johnson County (Kan.) Library Web site, Oct. 3, 2006: readers' corner/booklists, reviews & staff picks/fiction booklists (Epistolary Fiction - Stories told through diaries, letters and e-mail)
Auburn Hills Public Library Web site, Oct. 3, 2006: adult services/booklists by genre (Epistolary Fiction: Novels told wholly or partially in the form of letters, IMs, emails, etc.)
Wikipedia, Oct. 3, 2006: Epistolary novel (An epistolary novel is written as a series of documents. The usual form is letters, although diary entries, newspaper clippings and other documents are sometimes used.) List of contemporary epistolary novels (An epistolary novel tells its story through correspondence, letters, telegrams, and the like.)
Google search, Oct. 3, 2006 (epistolary story; epistolary short stories; epistolary journal)

Here are entered works of fiction written wholly or partially in the form of letters, telegrams, electronic mail messages, instant messages, etc. Works of fiction written in diary form are entered under