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.

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

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

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

When the guests of the Shangri-La Hotel are scared away by a white-haired female ghost, Dink and his friends investigate the mystery.

While picnicking on Squaw Island, Dink, Josh, and Ruth Rose find a hundred-dollar bill, and when they return to explore further they find an entire cave full of money.

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 may be after him as well.

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

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.

When Ruth Rose and her friends, vacationing in Florida, discover that her grandmother is about to invest in a project to recover sunken treasure, they stumble upon evidence that the entire plan may be a fraud.