As Nate the Great sets to work on his first international case, he searches for a lost "something" and saves the King of Sweden from a troublesome traveler.

When a model disappears, Nancy takes her place in a benefit fashion show and helps to track down a dress thief.

Like her idol Sherlock Holmes, eighth grader Ingrid Levin-Hill uses her intellect to solve a murder case in her hometown of Echo Falls.

After a dog she is watching disappears from a city parade and the owner receives a ransom note, thirteen-year-old Sammy must use her detective skills to solve the mystery.

A sixteen-year-old girl with a steady boyfriend suddenly begins receiving threatening phone calls while she is babysitting and anonymous notes in her high school locker.

Soon after Grandpa's teeth disappear from a glass of water near his bed, Inspector Rate has the whole town under investigation.

Nancy and her friends become involved in a search for lost treasure.

When a diphtheria epidemic hits her 1840 village, thirteen-year-old Jessie discovers it is actually a 1995 tourist site under unseen observation by heartless scientists, and it's up to Jessie to escape the village and save the lives of the dying children.

In his latest case, young Jeffrey Bones tries to discover the whereabouts of his grandfather's missing birthday present.

A fifth-grader with a photographic memory and her friend Eric help solve the mystery of the stolen diamonds.