Though it means Nate can't get his dog ready for the smartest pet contest, he agrees to search for the missing prize for the contest.

When Rosamond looks into her crystal ball to read Nate the Great's future, she sees a new case for him to solve--her money box is missing and she

With the help of the reader, two detectives search for the letters of the alphabet.

When a young computer expert and friend of Frank Hardy is poisoned, Frank and Joe access his computer to find the answers.

As the new Keepers of the School, sixth-graders Ben and Jill must decipher a handful of clues written as maritime riddles to save their school fr

While traveling by trailer in upstate New York to find a runaway, Trixie Belden and Honey Wheeler investigate a case of mysterious trailer thefts

Nancy Drew's sympathy for adopted twin babies leads her into a surprising mystery. Here is a reproduction of the original book, just as it was or

While Nancy and her friends are helping with a high school "chemystery" camp that teaches how science is used to solve crimes, a real mystery inv

The young sleuth searches for a treasure hidden in a city now buried under the Nevada desert.

Nate and his dog Sludge help Rosamond discover who has been tearing pages out of her books.