I used to be able to download the available pages from books on Google Books with pysheng(3) and/or getxbook, but neither of them seem to work any more. On Firefox I can go into “More Information>Media Info” and download page images one by one, but this is slow and cumbersome. Any recommendations for a replacement?
For books I’ve bought, I download them into Adobe Digital Editions and then use ePubor Ultimate to remove the DRM. That gives me an unencrypted .epub file.
Others claim to have been able to de-DRM their ebooks with calibre, but I never got that working. Maybe it used to work with older DRM versions or something.
Last one I bought (it’s been a year and a half or so) I was able to use Calibre to decrypt it. I do believe the store page has to have a flag saying it’s a digital editions download. I don’t think all offer that IIRC