Bianca is excited about the museum's first first-ever sleepover event! But she has an agrument with the other museum kittens, and then they can't find her. Did she decide to run away with the schoolchildren? Or do the pesky museum rats have something to do with her disappearance? Features black-and-white illustrations and an author's note on how the story came to be.

In this new series from best-selling author Holly Webb, the Museum Kittens are brave, clever, and never more than a whisker away from adventure! When the museum's visitors are gone for the day, it's time for the kittens to come out and play!