The book's title character lives in a house that is entirely black on both the inside and the outside. As a result, she finds it difficult to see her black cat Wilbur. Winnie makes two attempts to solve this problem by waving her magic wand, saying the magic word "Abracadabra" and changing Wilbur's color. Winnie succeeds in changing Wilbur's color but there are humorous unexpected consequences. The popularity of the book Winnie the Witch led to the publication of two different series of sequels.