Unlike many other spiritual paths there is no one book of text for Witch Craft. There isn't even one path. Many of the common pagan paths have "creation myths," but few of them believe the same as the others.
The origin of the name is fairly simple. As we all know Guisness are a beer company. They sponser or sponsored the book and their name got put in the title. The rest of the answer is fairly simple....
Witchcraft originated in the fertile and wonderful human mind. Magic is the manipulation of naturally occurring powers by the mind and will of a practitioner. Therefore witchcraft continues to dwell...