"Mastering Blockchain" by O'Reilly Media, Inc. seems to be good and easy to follow.

You can follow this link:

https://kkworld.in/blockchain-b-tech-aktu-pdf-notes-download-for-first-year-emerging-technology-for-engineering-kmc-102/

You can look here

Prasad R., Rohokale V. (2020) Blockchain Technology. In: Cyber Security: The Lifeline of Information and Communication Technology. Springer Series in Wireless Technology. Springer, Cham. https://doi.org/10.1007/978-3-030-31703-4_17

I would definitely recommend Bitcoin and Cryptocurrency Technologies from Princeton University. A lot of university courses about blockchain technologies in the world are following exactly this book which goes deeply into understanting all concepts and is fully self-contained, which in you use-case, is crucial. It is available as open-source: http://bitcoinbook.cs.princeton.edu/

I agree with Kristian Kostal and also recommend Bitcoin and Cryptocurrency Technologies from Princeton University.