
Author profiling is the analysis of a given set of texts in an attempt to uncover various characteristics of the author based on stylistic- and content-based features, or to identify the author. Characteristics analysed commonly include age and gender, though more recent studies have looked at other characteristics like personality traits and occupation

The Bixby letter is a brief, consoling message sent by President Abraham Lincoln in November 1864 to Lydia Parker Bixby, a widow living in Boston, Massachusetts, who was thought to have lost five sons in the Union Army during the American Civil War. Along with the Gettysburg Address and his second inaugural address, the letter has been praised as one of Lincoln's finest written works and is often reproduced in memorials, media, and print.

The Frankenstein authorship question refers to the historical uncertainty that exists around Percy Bysshe Shelley's contributions to Frankenstein; or, The Modern Prometheus, a novel attributed to Shelley's wife, Mary Shelley.

Many members of the Latter Day Saint movement believe that the Book of Mormon is historically accurate. Most, but not all, Mormons hold the book's connection to ancient American history as an article of their faith. This view finds no acceptance outside of Mormonism in the broader scientific community. Mormon apologists have proposed multiple theories to explain apparent inconsistencies with the archaeological, genetic, linguistic and other records.

The Man Who Wrote Frankenstein is a 2007 book written and published by John Lauritsen, which defends the unorthodox hypothesis that the poet Percy Bysshe Shelley, not his wife Mary Shelley, is the real author of Frankenstein; or, The Modern Prometheus (1818). The book also argues that the novel "has consistently been underrated and misinterpreted", and that its dominant theme is "male love."

The Spalding–Rigdon theory of Book of Mormon authorship is the theory that the Book of Mormon was plagiarized in part from an unpublished manuscript written by Solomon Spalding. The theory first appeared in print in the book Mormonism Unvailed [sic], published in 1834 by E. D. Howe. The theory is that a Spalding manuscript was stolen by Sidney Rigdon, who used it in collusion with Joseph Smith and Oliver Cowdery to produce the Book of Mormon. Although Rigdon claimed that he was converted to the Latter Day Saint movement through reading the Book of Mormon, Howe argued that this story was a later invention to cover the book's true origins.

Reminiscences: With the Century is the autobiography of Kim Il-sung, founder and former president of North Korea. The memoirs, written in 1992 and published in eight volumes, retell Kim's life story through his childhood to the time of Korean resistance. Initially, a total of 30 volumes were planned but Kim Il-sung died in 1994 after just six volumes; the seventh and eight volumes were published posthumously. The work reveals early influences of religious and literary ideas on Kim's thinking. An important part of North Korean literature, With the Century is held as a valuable if somewhat unreliable insight into the nation's modern history under late colonial Korea. The book is considered one of a few North Korean primary sources widely available in the West and as notable research material for North Korean studies.