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

Assisted by her cat Max and her friend Cash, Minnie tries to find Mary Moon, a valuable racing pigeon that has disappeared just before a big race.

The Aldens' dog, Watch, comes across a mysterious box with a note inside, a box that is part of a game called Geocaching. Henry, Jessie, Violet, and Benny join the game but soon suspect one of the members of the geocaching club is a thief.

When the Aldens stay at an old Kansas inn, Harry, Jessie, Violet, and Bennie try to figure out why guests travel great lengths to visit it.

When priceless antiques begin to disappear from Squire Grizzly's mansion, the ghost of his ancestor Bad Bart is suspected.

The adventures of the four Alden children as they spend a summer vacation on their very own island, purchased by Grandfather's father years ago.

Asks the reader to help Nate the Great solve the mystery of his friend Annie's missing dog Fang.

When the Alden children go camping on Blizzard Mountain, a place said to be inhabited by a ghost looking for buried treasure, they begin to think someone or something is trying to scare them off.

While in New Orleans helping mystery writer Olivia Chase open a new bookstore, the Boxcar Children investigate the mystery of some disappearing books and uncover some valuable items