Life imitates art imitates sex
In December of 2001, BBSpot published the article, Publisher Cleared in Pop-Up Book Trial, which describes a lawsuit against Random House brought by people who… well, just read it:
Publishing giant Random House was cleared of all charges in a lawsuit stemming from a fatal accident involving a pop-up book of sexual positions that they published from May 1999 to December 2000.
The class action suit was filed by Skrelnick, Callard, and Associates law firm in the Spring of 2001 when several people were injured trying to duplicate one the positions found in the book. It seems that a folding error on page 27 caused a number of couples to inadvertently snap their partners spines when attempting that position.
It took a few years for the real world to catch up, but in 2006 Melcher Media published The Pop-up Book of Sex. It appears to have received a number of positive reviews. Just be careful with the pose on page 27.