Henry Havelock Ellis, known as Havelock Ellis (2 February 1859 – 8 July 1939), was an English physician, writer, progressive intellectual and social reformer who studied human sexuality.

Henry Beam Piper (March 23, 1904 – c. November 6, 1964) was an American science fiction author. He wrote many short stories and several novels. He is best known for his extensive Terro-Human Future History series of stories and a shorter series of "Paratime" alternate history tales.

Maurice Marie Émile Leblanc (11 November 1864 – 6 November 1941) was a French novelist and writer of short stories, known primarily as the creator of the fictional gentleman thief and detective Arsène Lupin, often described as a French counterpart to Arthur Conan Doyle's creation Sherlock Holmes.

Anatole France (16 April 1844 – 12 October 1924) was a French poet, journalist, and novelist. He was born in Paris, and died in Saint-Cyr-sur-Loire. He was a successful novelist, with several best-sellers. Ironic and skeptical, he was considered in his day the ideal French man of letters.