Third-grader Dink and his detective friends hope to receive a big reward by finding the person whose video recorder picked up a picture of the local bank robber.

Dink Duncan and his two friends investigate the apparent kidnapping of famous mystery author Wallis Wallace. A is for author ... Dink writes to his favorite author, mystery writer Wallis Wallace, and invites him to visit Green Lawn. To Dink's amazement, Wallace says he'll come! But when the big day arrives, Wallace is nowhere to be found. The police think he just missed his plane, but Dink suspects foul play. It's up to Dink and his two best friends,...

"Young sleuths Abbi, Lydia, and Daniel notice that the dolphins off the coast of Maine are acting strangely and set out to find out why"--

Dink and his friends meet an exchange student, Sammi, who is actually the prince of an island country, hiding from those enemies who have kidnapped his parents and who may be after him as well.

While visiting Wallis's castle, Dink and his friends investigate strange noises that lead them to a dangerous secret.

Dink and his friends investigate why pets, like Mrs. Davis's canary, Mozart, are mysteriously disappearing all over town.

When Dink, Josh, and Ruth Rose visit a dude ranch in Montana, they find themselves with another mystery to solve, this one involving the theft of money from the ranch's safe and of a large gold nugget that Josh had found.

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.

While visiting their friend Wallis and her adopted daughter on Mount Desert Island, Maine, Josh, Dink, and Ruth Rose investigate why three white wolf cubs were stolen, and by whom.