I have a theory: That those of us with a social science inclination are intimidated by the specialized expertise required of the "hard" sciences. Consequently, we try to rival it with incomprehensible jargon, and findings with no evidentiary basis, of our own. We have, of course, our causes, racism, sexism, this-ism, that-ism. And, because we see hard scientists as our adversaries--because we don't understand what they're saying or how they reached their conclusions (and maybe because we envy them)--we accuse them of these sins.
This fine book is based on Alan Sokal's parody published by an allegedly scholarly social journal. Unfortunately for the journal's editors, they did not recognize it as a parody. In the parody, Sokal, a physicist, actually, heaven help us, quoted some of the post-modernists' "findings," that, for example, various conclusions of quantum mechanics--again, far beyond the comprehension of us social scientists--are based on white, male biases, and other nonsense of that ilk. The essays in the book were written by Sokal and other scientists citing particular post-modernists' work, and their dubious conclusions. They're good in describing, for example, the preconceived notions and false assumptions of the post-modernists, and how some "renowned" post-modernists' conclusions are not what they would have found had they followed their own logic. The essays, while eloquent, were written more for those who can understand the math used in the documents that the post-modernists trash.
There is a real talent in being able to translate difficult hard science math and conclusions into lay (non-scientist) terms. It has been done, and there are good magazines ("Astronomy" and "Scientific American" come to mind) that provide examples of it. While the book tries to do this, it can be a little dry for those of us without that hard science/math background. Fortunately, being dry and incomprehensible are not the same thing, so I understood what the authors were saying. And their refutation of the post-modernist balderdash is a blessing.
As to the post-modernists, as a veteran "leftist," I hear their balderdash all the time. Because of it, I've argued for years that the left is its own worst enemy. The (easily refutable) deductions of sexism and the like contribute to the "identity politics" which has limited my fellow progressives to shouting to each other.
I hope someone with the talent to which I already referred can better compile, or summarize the findings illustrated in this volume, so that maybe, just maybe, we can start being rational.