Feast your eyes on this blog dedicated to some pretty strange and odd books from a postmodern society.
Some books have a mature subject matter, peruse at your own will.
Here are just a few choice selections.
Fun with Plastic Bottles: A Craft “How-To” Create Book
Live and Love: A Christian View of Sex
Surgery of the Ambulatory Patient
My personal favorite:Looking Forward to Being Attacked
Transvestism: Men in Female Dress
A Laboratory Guide to Fungi