When Clara vanishes after the puppeteer Grisini and two orphaned assistants were at her twelfth birthday party, suspicion of kidnapping chases the trio away from London and soon the two orphans are caught in a trap set by Grisini's ancient rival, a witchwith a deadly inheritance to shed before it is too late.

The Museum of Peculiar Arts holds many oddities--a mechanical heart, a diary bound in its owner's skin . . . and Penny, a child-size marionette who almost looks alive. Fog clouds Penny's memories from before the museum, but she catches glimpses here and there: a stage, deep red curtains, long-fingered hands gripping her strings. One day, a boy named Chance touches Penny's strings and hears her voice in his head. Penny can listen, and watch, and think?...

Grover tries to prevent young readers from turning the pages of this book because he doesn't want to meet up with the monster on the last page.

When her five little ducks disappear one by one, Mother Duck sets out to find them.