irisa
Personally I switch off at any book that bolds, underlines and stresses the importance of it's "recommended decks". It seems to me if freedom and encouragement to find your own meaning in the cards and what you see is the goal then the deck should be irrelevant to the author (as it is with Greer's 21 Ways). Books that pimp the RWS are unfortunately two a penny but then I loathe the RWS and learnt with Thoth. I do believe anyone can learn with any deck.
irisa
irisa