After budget cuts threaten the art and music programs at Ella Mentry School, as well as some services, groundskeeper Burke finds gold and "gilver" on the playground, causing a modern-day gold rush.

While staying at the Crooked House, the family home of their housekeeper Mrs. McGregor, the Aldens try to solve a riddle that will lead them to a hidden treasure.

While searching for the lost treasure of Frogsbottom, Russell the sheep discovers treasure of a different sort.

A mysterious ghost leads the four boys of Tent 19 on the trail of buried pirate treasure.

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.

Riff Raff, a bold mouse pirate, searches for a missing clue that will help him and his cheese-loving crew complete a treasure hunt.

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.

Eva Wingdale and her owl classmates are on a camping trip to the other side of the forest, where one of the assignments is to make useful inventions--but Eva and Lucy become totally distracted by the legend of Nellie Wingdale, founder of Treetopolis and her buried treasure, and never finish their project.

Anna and her friend Crocodile set off on an adventure to find sunken gold, even though it is a dangerous and difficult quest.

When the Nearly Fearless Monkey Pirates land on an island in search of treasure, they find themselves surrounded by monkey pirate ghosts who are determined to protect it--and only Mr. Pickles, the youngest of Captain Banana Beard's crew, can save them from being dropped into a volcano.