I haven't read this work although I have read some of Muchéry's articles (which may well have formed the basis for this book).
He was a noted astrologer rather than anything else, and eventually created his own astrological oracle-type deck - not a Tarot as such, and that is reflected in his writings.
There are a number of ongoing discussions on Tarot & astrology on the forum, you may want to browse around and see which kind of approach appeals to you.