The Alden children agree to help their neighbor search for treasure she believes is hidden in her attic, but the quest becomes urgent when they realize that someone else is trying to find it first.

Two boys make up a series of treasure hunts for each other , with disastrous and hilarious results.

While the Aldens are visiting a friend of Grandfather's at the beach, Benny finds a long-lost piece of a map to a legendary pirate treasure, a discovery that brings unwanted attention from fortune hunters.

Two bands of pirate pigs fight over a box, but when they raise the white flag and open the box together, they find a treasure to share.

The Aldens accompany their grandfather to his class reunion and investigate the possibility of a buried Civil War treasure, and of a ghost in the bell tower, at Goldwin University.

The Alden children travel on a Mississippi paddle-wheel steamer to visit an old family friend in his cabin near Hannibal, Missouri, and try to discover who is responsible for the mysterious activities near the house.

The crew of the Barnacle finds themselves entranced by an ethereal song, and only Jack, who seems unaffected by it, can defeat the mysterious force behind the dark spell.

"Watch out! There's a Career Fair at Emerson School, and all the students have to choose what they want to be when they grow up. No problem. Ivy and Bean already have that all figured out. At least they thought so, until they meet Herman the Treasure Hunter. Pretty soon everyone in the second grade is looking for treasure-- and finding it. Everyone except for Ivy and Bean, that is. Where are their jewels, their gold, their money? Ivy and Bean need...

Roger's friend Kenneth uses an unusual sea vehicle of his own design to take them to an underwater cave, where a cache of old loot gathered by the mermaids turns out to contain a lot of very valuable old baseball cards.

After diving overboard during a mutiny on his uncle's pirate ship, Jack Hubbard, son of Old Mother Hubbard, is rescued from a stormy sea by an Owl and a Pussycat in a pea-green boat, and meets other characters from fairy tales and nursery rhymes while searching for hidden treasure.