Well, I said "My mother has..." but I should have said "My mother used to have..."
I gave it to her for her birthdag about 25 years ago. I bought it in a second hand bookshop.
I don't know if she still has it, or if it's still being published. But I'll ask her.

It may sound a bit strange to give your mother porn for her birthday, but I found that book in a second hand bookstore and I found it very fascinating, and I though my mother would find it fascinating too.