lots and lots of books just like that
If you follow those Amazon links ("customers who bought this book also liked ...") you'll see about 50 other similar titles. It's really a no-brainer as far as marketing goes -- a publisher can just figger, "Hey, sex sells!" So what distinguishes these various books apart from one another, is whether or not they're actually well done. Which one has good writing? Which one tells stories that have not been told? (And which one just trumpets the same old, tired, generally false mythology?) And since publishers aren't looking at that level of content -- all they need is grammaticality and, tah-dah, sex sells! -- you aren't guaranteed anything worth having at all.
Kind of like Madonna's book, "Sex." Aside from the nakey nakey pictures of Madonna, was there any reason for that book's existence? In other words, if you don't like Madonna then you won't like the book. Obvious ...