Bellairs, John / The Johnny Dixon Series / Grades 4 & up
In his first adventure, Johnny is plunged into a terrifying mystery when he removes a blue figurine, called an ushabt, from a church.

Byars, Betsy / The Herculeah Jones Series / Grades 3 & up
Sleuth Herculeah, and her friend, Meat, solve a number of mysteries together, including the discovery of a long-dead body in a decaying mansion known as Dead Oaks. 

Finney, Patricia / The Lady Grace Series / Grades 4 & up
Lady Grace Cavendish, a favorite maid of honor of Elizabeth I, must solve a murder mystery and clear the name of her betrothed. 

Hale, Chet / The Chet Gecko Series / Grades 3 & up
Chet, the best lizard detective in his elementary school, is hired by a classmate to find her missing brother, and uncovers a plot involving a Gila monster's revenge upon the school's football team.

Higson, Charles / The Young James Bond Series / Grades 5 & up
Thirteen-year-old James Bond arrives at Eton College in the 1930s, and must battle against an insane arms dealer and his plan to create a race of indestructible soldiers.

Horowitz, Anthony / The Alex Rider Series / Grades 4 & up
After his uncle's death, fourteen-year-old Alex is forced to continue his uncle's dangerous work for Britain's intelligence agency, MI6.

Klise, Kate / The Regarding Series / Grades 3 & up
In the first adventure, a middle school principal asks a fifth-grader to write a letter regarding the purchase of a new drinking fountain for their school, and much chaos follows.

Roy, Ron / The A to Z Mystery Series / Grades 3 & up
As the series begins, Dink Duncan and his two friends investigate the apparent kidnapping of famous mystery author Wallis Wallace.

Simon,Seymour / The Einstein Anderson Series / Grades 3 & up
Adam "Einstein" Anderson uses his knowledge of science to solve a series of scientific riddles.

Van Draanen, Wendelin / The Sammy Keyes Series / Grades 4 & up
In her first adventure, Sammy's habit of speaking her mind gets her into trouble when she investigates a robbery at a seedy hotel across the street from the seniors' building where she is living with her grandmother.

Warner, Gertrude Chandler / The Boxcar Children Series / Grades 3 & up
Four orphaned children run away and live in a boxcar, until they are found by their grandfather.