If you mean one, single book that all witches use, then no. If you mean books written by witches/pagans that have real spells in them, there are plenty of good books. Any books by the Farrars, Margot Adler, Gerald Gardner, Scott Cunningham, Ray Buckland, and Doreen Valentine are good to pick up.
No. Mermaids do not exist and magic spells are not real.
No there is not. Spells and magic do not exist in the real wold
Spells and magic do not exist in the real world.
In a book. They are not real so do not exist in the real world.
Nowhere it doesn't exist in real life
No. Mermaids are not real. They do not exist and are from stories and legends. People can not become mermaids. Spells are also not real and there is no spell that can change you into something else.
No one has done a spell to become a mermaid. People can not change into other things. Mermaids are not real and do not exist in real life.
No. Mermaids are not real and are only from myth and legend. They do not exist. Spells to turn people into other things do not exist and people can not change into mermaids.
Magic spells are not real and people can not change into mermaids. They are make believe and do not exist.
No. Spells and magic are entirely fantasy and do not exist in the real world.
None of the warriors books are 'real' if you mean that you think the cats do exist, then no. But the book, Sunrise is real.
No. Jiraiya wrote it and he doesn't exist.