Can you please nominate a proper textbook about Bitcoin that covers the cryptographic tools utilized in Bitcoin?
1@Jestin I'm not really after the source code, I'm looking for the tools and background of bitcoin instead.– user153465Oct 24, 2016 at 15:45
1I still recommend what the answer there says. The Princeton Bitcoin Book is great, and so is Mastering Bitcoin, but remember that they are both outdated. The source code is really the definitive documentation to how Bitcoin works. That's why they call it a "reference client".– JestinOct 24, 2016 at 15:52
REGARDING TEXTBOOKS ONLY:
The best one is
Bitcoin and Cryptocurrency Technologies by Narayanan & Bonneau et al.
You can get a draft version for free from Arvind Narayanan's blog.
The one by Andreas M. Antonopoulos, Mastering Bitcoin is good too.
Roger Wattenhofer & Christian Decker et al also wrote a nice one called "The Science of the Blockchain" about blockchains in general.