Many detectives solve their cases as teams with friends, and sometimes, they even form clubs and businesses for their investigations.
Friends
About a girl in elementary school who solves mysteries with the help of her friends, who call themselves The Martians. By Susan Pearson.
A group of friends solve mysteries with their pet Scottie dog. Also called the Five Find-Outers and Dog By Enid Blyton. 1943-1961.
The Lone Pine Club is a group of friends who love nature and investigate mysteries. Vintage British children’s mystery series. By Malcolm Saville. 1943-1978.
The series is about a couple of kids who like magic tricks, Kate and Max. Kate is the one who considers herself a detective, and Max is the main magician with Kate as his assistant. Together, they use magic tricks and concepts in magic to solve their mysteries. By Elizabeth Levy. 1988-1991.
J. Huntley English is a boy genius who also happens to believe in monsters and wants to find real ones. With his friends, he investigates strange phenomena and odd people in their small town in Pennsylvania. By Drew Stevenson.
About a girl who wants to be a detective and her two friends. They investigate spooky mysteries in a small town in Pennsylvania. By Drew Stevenson.
The Sherlock Street Detectives are a group of neighborhood friends who live on Sherlock Street and like to solve mysteries. The stories are educational, and the kids use basic scientific concepts to solve their mysteries. By Mary Blount Christian. 1989-1991.
“Queer” as in strange, weird, mysterious. No other sense of the word! Two friends, Gwen and Jill, solve mysteries with the help of Jill’s dog, Fletcher, who loves salami. By Elizabeth Levy.
A group of third graders investigates strange phenomena and possible ghosts, including one at their school. By Grace Maccarone.
A classic mystery series featuring a girl and her group of friends who solve mysteries and support good causes. Created by Julie Campbell and continued by other authors. 1948-1986.
Official Clubs and Businesses
A ten-year-old boy detective forms a detective agency called the with his neighborhood friends.
The Mysterious Benedict Society Series
The Mysterious Benedict Society is a group of children with special abilities, who are chosen by a man named Nicholas Benedict to undertake an undercover mission to stop his evil twin, Ledroptha Curtain, from broadcasting secret, subliminal messages and trying to take over the world. 2007-2019.
A group of kids, each with their own secrets, form a club to solve mysteries. 1991-1992.
Four neighborhood friends, who call themselves by the nicknames Wizard, Skinny, Tubby, and Snitch, have their own private detective club. By Crosby Bonsall. 1963-1980.
The Three Investigators Series
Three friends form a detective business, using a trailer in a salvage yard as their headquarters.
Jestress's Forgotten Books and Stories 