Lily Adams Beck, née Elizabeth Louisa Moresby was a British writer of short stories, novels, biographies and esoteric books, under the names of L. Adams Beck, E. Barrington and Louis Moresby, and sometimes other variations: Lily Adams Beck, Elizabeth Louisa Beck, Eliza Louisa Moresby Beck and Lily Moresby Adams.

Lyman Frank Baum was an American author best known for his children's fantasy books, particularly The Wonderful Wizard of Oz, part of a series. In addition to the 14 Oz books, Baum penned 41 other novels, 83 short stories, over 200 poems, and at least 42 scripts. He made numerous attempts to bring his works to the stage and screen; the 1939 adaptation of the first Oz book became a landmark of 20th-century cinema.

Lawrence Pearsall Jacks, abbreviated L. P. Jacks, was an English educator, philosopher, and Unitarian minister who rose to prominence in the period from World War I to World War II.

Lyon Sprague de Camp was an American writer of science fiction, fantasy and non-fiction. In a career spanning 60 years, he wrote over 100 books, including novels and works of non-fiction, including biographies of other fantasy authors. He was a major figure in science fiction in the 1930s and 1940s.

L. T. Meade was the pseudonym of Elizabeth Thomasina Meade Smith (1844–1914), a prolific writer of girls' stories. She was born in Bandon, County Cork, Ireland, daughter of Rev. R. T. Meade, of Nohoval, County Cork. She later moved to London, where she married Alfred Toulmin Smith in September 1879.

Louis William Rogers, commonly known as "L.W.," was an American teacher, railway brakeman, trade union functionary, socialist political activist, and newspaper editor. Rogers is best remembered in this context as one of the key officials of the American Railway Union jailed in conjunction with the Pullman Strike of 1894. After more than two decades in and around the labor movement, Rogers shifted his activity to mysticism as a prominent lecturer, writer, and long-time President of the Theosophical Society in America.

Isabella Augusta, Lady Gregory was an Irish dramatist, folklorist and theatre manager. With William Butler Yeats and Edward Martyn, she co-founded the Irish Literary Theatre and the Abbey Theatre, and wrote numerous short works for both companies. Lady Gregory produced a number of books of retellings of stories taken from Irish mythology. Born into a class that identified closely with British rule, she turned against it. Her conversion to cultural nationalism, as evidenced by her writings, was emblematic of many of the political struggles to occur in Ireland during her lifetime.

Lady Mary Wortley Montagu was an English aristocrat, writer, and poet. Born in 1689, Lady Mary spent her early life in England. In 1712, Lady Mary married Edward Wortley Montagu, who later served as the British ambassador to the Sublime Porte. Lady Mary joined her husband on the Ottoman excursion, where she was to spend the next two years of her life. During her time there, Lady Mary wrote extensively on her experience as a woman in Ottoman Constantinople. After her return to England, Lady Mary devoted her attention to the upbringing of her family before dying of cancer in 1762.

Koizumi Yakumo , born Patrick Lafcadio Hearn, was an Irish-Greek-Japanese writer, translator, and teacher who introduced the culture and literature of Japan to the West. His writings offered unprecedented insight into Japanese culture, especially his collections of legends and ghost stories, such as Kwaidan: Stories and Studies of Strange Things. Before moving to Japan and becoming a Japanese citizen, he worked as a journalist in the United States, primarily in Cincinnati and New Orleans. His writings about New Orleans, based on his decade-long stay there, are also well-known.

Langdon Elwyn Mitchell was an American playwright who was popular on Broadway during the early twentieth century.