SAY NO TO TEXTBOOKS!

When I decide to digitalize all my textbooks, I found those 4 websites very useful:

  1. https://www.jiumodiary.com/
  2. http://muchong.com/bbs/search.php
  3. https://www.foundpdf.com
  4. http://bbs.pinggu.org/

If you want to do the same thing, you can give them a try.

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