D. D. Home: His Life and Mission is a biographical work edited (and partly authored) by Arthur Conan Doyle, focusing on the famous 19th-century medium Daniel Dunglas Home. In this compilation, Doyle presents Home's extraordinary life story and the purported miracles attributed to him, framing Home as a pivotal figure in the spiritualist movement. The book covers Home's early demonstrations of psychic talents, such as levitation and communicating with spirits, which astonished even royal audiences. Doyle, a fervent spiritualist, provides commentary and context, defending Home's feats as genuine and emphasizing his "mission" to prove survival after death. Anecdotes of séances – tables rising, phantom hands, and accurate spirit messages – are detailed with both skepticism and belief in mind. By curating eyewitness accounts, letters, and his own insights, Doyle aims to solidify D. D. Home's legacy as a true apostle of spiritualism. His Life and Mission stands as a significant piece of Doyle's non-fiction, reflecting his commitment to documenting and vindicating the work of a man he saw as a "missionary" of the unseen world.

Sir Arthur Conan Doyle (1859–1930) was a Scottish author, physician, and spiritualist best known for creating the legendary detective Sherlock Holmes. Born in Edinburgh, he studied medicine at the University of Edinburgh, where his storytelling talent began to emerge alongside his scientific education. Though initially practicing as a doctor, Doyle turned to writing to support himself, eventually achieving worldwide fame with the publication of A Study in Scarlet in 1887. Beyond detective fiction, he explored historical novels, science fiction, and supernatural themes, notably in the Professor Challenger series. A passionate advocate for justice, he was involved in several real-life legal investigations. In his later years, Doyle became deeply involved in spiritualism, dedicating much of his time and writings to life after death. His legacy endures as one of the most influential figures in literary history.