The word 'coven' was invented by Witches thousands of years ago to denote a group of Witches who practice together. Witta is the Irish form of the word Wicca. The word 'fairy' describes diminutive beings in the British Isles with bug wings and pink tights that are really cute and helpful. A trickster god likes to play harmless, funny jokes on people. All 8 Sabbats are Celtic in origin.
Witches only work with the powers of light and creation.
Widdershins is the direction of evil and chaos. Any book about Witches or Pagans written by a non-Pagan is not a valid source of information. The Millenium is a time of great spiritual importance to Witches. It would be a better world if everyone were a Witch, Wiccan or Pagan. No true Witch would ever use an inverted pentacle or pentagram because that is a symbol of Satan.