Everyone's right, especially me.
I think that Place's book is both fascinating and flawed, and I believe the flaws are quite complex. I can't comment on the historical accuracy of his accounts but I do believe the book contains contradictions and I suspect this is because it was shaped by conflicting impulses.
As others have noted, there's a tension between the tarot history section and the section on reading using the RWS. But there's also a more fundamental ambivalence that runs throughout the book, I think. I think Place states clearly that he does recognize the ambiguity of historical facts, and he does say in many places that we can't know for sure, tarot developed differently in different places, etc. (On this I disagree with room, and disagreeing is not the same as browbeating). BUT he also seems to nonetheless try to lead us to a "one true ah-ha!" interpretation of tarot trumps. (On this I agree with room.)
I see this ambivalence as a fairly widespread problem of modern life. On the one hand, we're all pretty sophisticated about psychology and society. We know that different cultures have dramatically different world views, individuals within a culture may still vary widely, etc. etc. Only a rube thinks there's "one true way," right? On the other hand, c'mon--really, the way *I* see it really IS the best way! After all, why would I *choose* a factually, morally, or spiritually INFERIOR way of thinking or living?
It's hard to live in a world of complete relativism or subjectivism. And with tarot, if we say "well, the cards mean just whatever you want them to, darlin'" then maybe you're reading the cards, and maybe you're just making up stories, and maybe you're delusional. The book slips almost imperceptibly between different perspectives, sometimes treating the cards as historically embedded--as the pieces for a game, as the representations of the triumphs in parade, etc.--and other times treating them as a "true secret we hope to have revealed." I think Place's editor was just a bit too easy on him, and didn't push him to reconcile these two conflicting impulses. So the "story" of tarot remains complex and fragmented.....through a glass darkly.