I acquired and read this book as a paperback long before Amazon became the prime source for my library. I was an undergraduate at the time (early '80s) and I found the material in the text to be highly stimulating and somewhat controversial, given that third wave feminists were becoming empowered and strained to tell us that gender was a social construct. I had many discussions, though some might term them arguments, with fellow students in the university cafes and bars in which I made the obvious point that men and women had recognised their differences for millennia and it now seemed odd that only recently had it become reasonable to assert that, what seemed obvious to our ancestors for generation after generation, was so much tosh and that the whole enterprise was faulty from the start. Our sexual identity was culturally determined. Jessel and Moir had produced a text that I could cite to overcome animated and heated feminists who seemed convinced I was demon-spawn.I may have loaned my original copy, which was heavily annotated with marginal thinking and lavish use of highlighting pen. It is no longer in my possession. I have become intrigued and mystified by the debate that still rages on this issue. I am as annoyed as I am bemused by what seems to be happening on North American campuses where SJWs seem to be running out of control. I was embarrassed by the feminist inspired critique of Cassie Jays film The Red Pill in my homeland (Australia). I wanted to reacquaint myself with a number of references to help should I again enter the sex-differentiation arena.I looked at Simon Baron Cohen's work on Amazon and was about to purchase it when I recalled my affection for this neat little book. A quick search showed that it was still available and had been reviewed and republished a number of times since my first exposure. I purchased it rather than Baron Cohen's work, not necessarily because it is superior- I cannot say that- but because I found it so easy to read and I would like my young daughter to understand the material. I may still purchase The Essential Difference, as an added reference, but for the moment I am happy that this book remains relevant and concise.I cannot recommend it highly enough for anyone interested in refuting the nonsense that passes for argument among the feminist tribes.