"Elena and Naomi organize a dig for lost treasure and uncover a few unexpected surprises along the way! Will their adventure end in ruin, or can they dig themselves out of trouble and save the day?" -- from publisher.

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.

Inspired by her report on a female pirate, and challenged by a boy in her class, Kylie Jean and her friends decide to form a pirate gang, complete with costumes, a secret hideout, and buried treasure--but when the treasure disappears Kylie makes an important discovery about the local haunted house.

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.