Question: is the movie hocus pocus based on a book

Answer: No, In the 1994 TV documentary Hocus Pocus: Begin the Magic, and on the film's Blu-ray release, producer David Kirschner said he came up with the idea for the film one night. He and his young daughter were sitting outside and his neighbor's black cat strayed by. Kirschner invented a tale of how the cat was once a boy who was changed into a feline three hundred years ago by three witches.