I am really sorry, but I just cannot agree.
The Tarot Handbook is rich with symbolism, the astrology and such.
It is just put across in an understandable manner.
I really do not think the author is making her own version of the Thoth, she
is focusing on the symbols in the cards and their meanings, and as she has obtained a degree in symbology she does know a great deal about it.
She is not novice to Egyptian symbols or anything like that, so I would say that makes her understand the Thoth tarot which is rich in symbols of different cultures quite well.
I think that as opposed to for example Ziegler who merely skims on the surface and does not actually offer the reader with explanations of what the cards depicts and where is that coming from, but instead offers a lot of new age fluff, this author actually tries to see what Crowley might have been trying to depict in the cards by choosing the symbols, colours and images he did.
I do not understand why you would pick a sentence out of the chapter context from The Tarot Handbook book and base your opinion on that.
In addition to this, is not every one of the Thoth books out there on the market written for the very same purpose ? I.e. to put the info from The Book of Thoth in a more digastable form. From many a thread on this website for example it is quite clear that The Book of Thoth is way too esoteric for many people, to the point of lacking any comprehension.
Plus The Book of Thoth in my opinion does not work as a tool for self growth, does not offer affirmations etc., merely describes a concept. So I think other books on Thoth definitely have what to add in this respect.
In my opinion this is what the author of The Tarot Handbook has managed to do quite wonderfully, without putting herlself into the cards, which is something I feel has happened with Ziegler, it seems to reflect a lot of his personal views on the world and strays away from what is actually in the cards.
You could actually accuse any author out there that they think they can do better than The Book of Thoth, otherwise why are they trying to write a book on this tarot ?