I can recommend you some good books:
1. "Digital Gold" by Nathaniel Popper
2. "Cryptoassets: The Innovative Investor's Guide to Bitcoin and Beyond" by Chris Burniske and Jack Tatar
3. "Blockchain Revolution" by Don Tapscott and Alex Tapscott
4. "The Age of Cryptocurrency" by Paul Vigna and Michael J. Casey
5. "American Kingpin" by Nick Bilton
I agree that this books are crutial for studycrypto on high level.
But if you don't have access to book stores, you can check
bitcoinwiki.org for that. It's the most common advice you'll get on this forum