Dink and his friends unearth the mysterious truth behind the envelopes incorrectly delivered to his house.

When the umpire at the baseball game fundraiser is accused of stealing a collection of autographed baseballs, Dink, Josh, and Ruth Rose try to prove his innocence.

When he finds a torn piece of paper with only part of a word on it, boy detective Nate sets out to find the missing pieces.

It's gone! Oliver's boring blue beach bag is gone. Inside are his clothes, shoes, and a special seashell. All he has left is his beach ball. This is a perfect case for Nate the Great and his trusty dog, Sludge. But they don't find many clues in the sand and surf. What trail should they follow next? Follow the leader to find out!

Dink and his two friends help Lucky find the culprit who stole Lucky's winning lottery ticket.

Josh and his two friends look for the person who stole a peregrine falcon from its nest.

The blatant acts of a lady swindler posing as Nancy Drew arouse the suspicion of friends and local police against the real Nancy.

Nancy Drew must use clues in a dead man's letters to find some unpublished musical manuscripts that will save an old man and his granddaughter from financial ruin.

When someone steals the money the town has been collecting to help the ducks, Josh and his friends try to find the thief.

A brass-bound trunk mistakenly delivered to Nancy's cabin on a New York-bound ocean liner becomes the first clue leading her to suspect that international jewel thieves are aboard.