editors changed their mind 
there is also a PDF version that you can purchase via Nxt Marketplace for 1 USD: https://nxtforum.org/ebooks/the-mysteries-and-puzzles-behind-the-cryptonote-technology-(theses)/ (view at http://76.176.198.6/market/ ) - it is interesting that it is really possible to buy and sell books by using Nxt blockchain
there is also a PDF version that you can purchase via Nxt Marketplace for 1 USD: https://nxtforum.org/ebooks/the-mysteries-and-puzzles-behind-the-cryptonote-technology-(theses)/ (view at http://76.176.198.6/market/ ) - it is interesting that it is really possible to buy and sell books by using Nxt blockchain Who even buys books nowadays? In most cases, you can download them for free