In the last NXT update newsletter, there is a link to a book “SNAPSHOT - Nxt, unsurpassable blockchain solutions”
- a collection of articles, which, after a short introduction to the concept of blockchain technology, looks deep into Nxt.
It provides a good summary, but I enjoyed the free audio of the 1st chapter - "The Genesis: The Miss America of alternate cryptocurrencies"
If your interested in learning more about NXT, five it a listen here:
https://www.nxter.org/snapshot-nxt-unsurpassable-blockchain-solutions/