Roald Dahl (13 September 1916 – 23 November 1990) was a British novelist, short-story writer, poet, screenwriter, and wartime fighter pilot. His short stories are known for unexpected endings, and his children's books for unsentimental, macabre, often darkly comic mood, featuring villainous adult enemies of the child characters.

James Smith Dashner (born November 26, 1972) is an American writer of speculative fiction, primarily series for children or young adults, such as The Maze Runner series and the young adult fantasy series the 13th Reality.

Bryan Davis (born April 21, 1958) is an American Christian fantasy author, his most popular series being Dragons In Our Midst, Oracles Of Fire, and Children of the Bard. Davis was born in 1958 and grew up in the eastern United States.

Daniel Defoe (born Daniel Foe; c. 1660 – 24 April 1731) was an English trader, writer, journalist, pamphleteer and spy. He is most famous for his novel Robinson Crusoe, published in 1719, which is claimed to be second only to the Bible in its number of translations.

Melissa de la Cruz (born 1971) is a New York Times bestselling Filipina-American author known for her work in young adult fiction. Melissa de la Cruz was born in Manila, Philippines and says that she has wanted to be an author since she was eleven years old.

Joseph Henry Delaney (born 25 July 1945) is a British author, known for his dark fantasy series Spook's.

Charles John Huffam Dickens FRSA (7 February 1812 – 9 June 1870) was an English writer and social critic. He created some of the world's best-known fictional characters and is regarded by many as the greatest novelist of the Victorian era. His works enjoyed unprecedented popularity during his lifetime and, by the 20th century, critics and scholars had recognized him as a literary genius. 

Chris D'Lacey (born 15 December 1954) is an English writer of children's fiction, he is best known for writing The Last Dragon Chronicles. He has also written many other books including A Dark Inheritance.

Emma Donoghue (born 24 October 1969) is an Irish-Canadian playwright, literary historian, novelist, and screenwriter.

Sir Arthur Ignatius Conan Doyle KStJ DL (22 May 1859 – 7 July 1930) was a British writer and physician. He created the character Sherlock Holmes in 1887 for A Study in Scarlet, the first of four novels and fifty-six short stories about Holmes and Dr. Watson. The Sherlock Holmes stories are considered milestones in the field of crime fiction.

Alexandre Dumas (24 July 1802 – 5 December 1870) was a French writer. Many of his historical novels of high adventure were originally published as serials, including The Count of Monte Cristo, The Three Musketeers, Twenty Years After, and The Vicomte of Bragelonne: Ten Years Later. 

Clare B. Dunkle (born June 11, 1964) is an American children's fantasy author and librarian. She now makes her home in Germany.