But the childrens’ lives don’t stay quiet for long. A slew of bank robberies is terrorizing the city. And when General Farnum, the ringmaster of the museum’s now immensely popular flea circus, is charged with murder, the search for the real killer uncovers a plot much bigger than any individual crime—a plot that can only be the work of Nicholas Rattigan.

In this third book in the exceptional Curiosity House series by bestselling author Lauren Oliver and mysterious recluse H. C. Chester, the four children must uncover Rattigan’s newest dastardly scheme, wage war with a rival freak show, and deal with a spy who may have infiltrated their happy home.