It amazed me with its ability to extract and list down every single page from Google Books. I can’t be certain if this is considered illegal, but I don’t see any difference between viewing it from my browser and viewing it from an image manager.
As the name implies, Google Book Downloader does exactly what it says, it will give you a list of url of the images, what you need next is a download manager such as Download Accelerator Plus or Flashget.
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