Can you please nominate a proper textbook about Bitcoin that covers the cryptographic tools utilized in Bitcoin?
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.