>>11914306
>>11915497
Context:

1. Some of these are stolen from amazon. If you pay for an account you can get a lot of free books with the program. Periodically people dump them.

2. A Taiwanese forum called Endless Fight scans an assload of books in 300dpi and their scans leaked a few years ago. I think most of the collection has leaked out. Some of their scanners have literally died as well.

3. People upload them to preseve them on eh and archive.