This list consists of fictional investigators written specifically for younger readers:
| Detective | Creator | Debut |
|---|---|---|
| Encyclopedia Brown | Donald J. Sobol | Encyclopedia Brown, Boy Detective (1963) |
| Louise and Jean Dana | Harriet Adams | By the Light of the Study Lamp (1934) |
| Nancy Drew | Carolyn Keene | the Secret of the Old Clock (1930) |
| The Famous Five | Enid Blyton | Five on a Treasure Island (1942) |
| Frank and Joe Hardy | Franklin W. Dixon | the Tower Treasure (1927) |
| Fletcher Moon | Eoin Colfer | Half Moon Investigations (2006) |
| The Secret Seven | Enid Blyton | the Secret Seven (1948) |
| Holly Short | Eoin Colfer | Artemis Fowl (2001) |
| The Three Investigators | Robert Arthur | The Secret Of Terror Castle (1964) |
| Harriet M. Welsch | Louise Fitzhugh | Harriet the Spy (1964) |
| Nate the Great | Majorie W. Sharmat | Nate the Great |
Matthew Livingston [1] Marco Conelli Matthew Livingston & The Prison of Souls Series]] [2007]