I have this color-coded version of the book on my coffee table and I like flipping through it sometimes.
idk about your schizo rant because it's not banned or anything but the concepts described inside are indeed quite foundational.
however as a textbook/learning style book it is kind of lacking. definitely teach kiddos about these concepts because it helps just regular everyday common sense figuring about dimensions and relations of shapes, but I don't think you necessarily need to give them this book verbatim. it's more of a reference, like a dictionary for math.