Imagine Ellen's surprise when Princess Mirror-Belle climbs out of the bathroom mirror! She comes from a world where bubble fish swim in the bath, elves sleep in slippers, and brave knights fight fire-breathing dragons. And while Ellen has chicken pox, Mirror-Belle has dragon pox - but she knows just the cure. The bath is soon overflowing with bubbles and goo...but will it get rid of their spots? Glittery picture book follow on to the other Princess Mirror-Belle chapter books.