Grace and Ellie have been best friends since second grade. Ellie's always right in the center of everything -- and Grace is usually happy to be Ellie's sidekick. But what happens when everything changes? This time it's Grace who suddenly has everyone's attention when she accidentally starts a new fad at school. It's a fad that has first her class, then her grade, and then the entire school collecting and trading and even fighting over . . . buttons?!...

Surveys the history of coin minting in the United States, explains what factors determine the value of collectible coins, and offers ways to start a collection.

Fergal Banfield, an eccentric lad who collects cans, is surprised to find some unexpected--and even alarming--things in a few of his treasures, and when he meets Charlotte, another collector, they begin an investigation that leads them into dangerous territory.