The "Halloweentown" book has creatures in it that we see later in the film.
The vampire the Cromwell kids see at the dentist's office is not green.
Disney ChannelThe Cromwell kids are first introduced to Halloweentown through the storybook Grandma Aggie shows them.
But the vampire in the book has green skin, and the one shown at the dentist's office does not.
The "Halloweentown" book was created specifically for the movie, which is why the drawing of a witch on a broom looks so much like Marnie.
Persons:
Cromwell, Aggie, Marnie
Organizations:
Disney