These are not 1980's Womanpower witches. These are bad Witches, and Power-within, as far as they are concerned, is no good at all unless you can zap somebody with it.
Witchcraft works the worst sort of magic on many scholars.
Latest and strongest of the Mayfair witches, and inheritor of the fantastic Mayfair legacy, is Rowan, who's a brilliant neurosurgeon in San Francisco when the novel opens, never having returned to the family home in New Orleans since the day of her birth.