The author created a tool called "Clothes-Ripping Tool". After choosing 2 different images, you could create a paper-tearing effect on it.
Link for the tool: http://viid.me/9MeVM
This anthology is based on the aforementioned tool. However, the author used some Java coding to enable viewers to "tear" the front images by pressing & holding the mouse. (Page 3 is a demonstration of the effect the tool could provide.)
Since it's impossible for me to upload the original file, instead, I provide all the images inside the package.