To Stir a Magick Cauldron, originally printed in 1995. This book, along with the rest of the Next Generation Witchcraft series, is always going to be controversial as it has been revised and edited and reprinted dozens of times.
It seems that as Ravenwolf grows and changes, her books do as well. Rather than being a record of her teachings of the time, they evolve and all of the ranty crankiness that earned her a reputation of dangerous fluffiness is washed away as if it never was. Personally, that alone is a reason to avoid learning from this person.
You want your Craft instructor to have a strong ethical character – to embody the ideals they mean to teach you. If they are unwilling or unable to stand by what they have said in print in the past, then that should tell you something very important right there.
That said, this is a book review, not an author review.