You are right ! I did find it on github but I don't think it's the second edition . I believe it's the "Open Edition" which is more like the first edition. In any case, I will check it out online, and if It's nicely written I'll probably buy it as I find the github format cumbersome and hard to follow (besides that , we need to support the author as well). Also, what do you think of the other recommended books in this list ? Was thinking about getting CryptoAssets as well since I have some experience trading.