There is a book on this page (http://img.docin.com/players/DocinViewer.swf?productId=463932528), and it is inside a swf player. Previously there was a software which can extract all pages in the swf player and store them as a pdf file.
So there should be 3 steps:
- Find the file source inside the swf player
- Extract all pages from the swf player.
- Save them as a whole pdf file.
How might one accomplish this?