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 Wow! You have very interesting thread there on nxtforum.org.
The mysteries and puzzles behind the CryptoNote technology -> that's what attract people at first to start mining BCN and that's what make it more interesting and true crypto note coin