Books about Mystery and detective stories (sorted alphabetically)
- Cry at Midnight Mildred A. Wirt
- Crystal Ball Roy J. Snell
- Dan Carter and the Cub Honor Mildred A. Wirt
- Dan Carter and the Great Carved Face Mildred A. Wirt
- Dan Carter and the Haunted Castle Mildred A. Wirt
- Dan Carter and the Money Box Mildred A. Wirt
- Dan Carter-- Cub Scout Mildred A. Wirt
- Dan Carter, Cub Scout, and the River Camp Mildred A. Wirt
- Danger at the Drawbridge Mildred A. Wirt
- Dangerous Dilemmas: Startling but True James Anderson Peddie
- Daring Twins: A Story for Young Folk L. Frank Baum
- Dave Porter in the South Seas; or, The Strange Cruise of the Stormy Petrel Edward Stratemeyer
- Dave Porter on Cave Island; Or, A Schoolboy's Mysterious Mission Edward Stratemeyer
- Dave Porter's Return to School; Or, Winning the Medal of Honor Edward Stratemeyer
- Dean Dunham; Or, the Waterford Mystery Jr. Horatio Alger
- dégringolade (French) Emile Gaboriau
- Deserted Yacht Mildred A. Wirt
- Doris Force at Locked Gates; Or, Saving a Mysterious Fortune Julia K. Duncan
- Dorothy at Oak Knowe Evelyn Raymond
- Dorothy Dale and Her Chums Margaret Penrose
- Dorothy Dixon and the Double Cousin Dorothy Wayne
- Dorothy Dixon and the Mystery Plane Dorothy Wayne
- Dorothy Dixon Solves the Conway Case Dorothy Wayne
- Dorothy Dixon Wins Her Wings Dorothy Wayne
- Extraordinary Adventures of Arsène Lupin, Gentleman-Burglar Maurice Leblanc