From the product Description
Changing Faces presents an idiosyncratic and humorous collection of paintings, drawings, cartoons, masks, toys, advertisements, and other works of ephemera that -- either by flipping or flopping or just plain staring -- somehow transform the human physiognomy. Here you will find optical illusions from the Renaissance, Enlightenment-era political cartoons, and Victorian toys that all start off as one thing and end up as another. Sometimes these mutations were made for fun (give magnetic hair to a bald man!) sometimes for profit (buy a Studebaker!), and sometimes to score a political point (watch a French king turn into a big fat pear!), but the results are always an intriguing pleasure to watch.
Here's the link for the book Changing Faces