After they had successfully entertained television viewers from all around the world in the late sixties and early seventies of past century, the group Monty Python started making full-length movies and publishing books.
Although their fans expect similar gags in their movies, hardly anyone expected from silly Britons to make pell-mell even in publishing venture.
For a book titled "The Brand New Monty Python Bok" (sequel to Monty Python's Big Red Book with striking blue cover), Terry Jones hired his sister-in-law Katharine Hepburn (accidentally with same name as the famous American actress) to assist them.
The cover was realistically made to look like it was greasy and filled with dirty fingerprints. It was made so realistic that many readers didn’t wanted to buy the book, asking for "newer" and more preserved copy.
However, there was also another thing - the cover could be peeled off and reveal hidden pictures of naked girls.