Books

Books are probably the best source of learning in any field and not just technology. They provide great insight and walk you through concepts very clearly and as they are handy you can always look up for ideas in them.

These are a few books we would like to refer to you:

Beginning Blockchain - Bikramaditya Singhal, Gautam Dhameja, Priyanshu Sekhar Panda
Mastering Bitcoin - Andreas M. Antonopoulos
Mastering Ethereum - Andreas M. Antonopoulos, Dr. Gavin Wood
BitcoinBook
ProgrammingBitcoin
LnBook - Mastering the Lightning Network
Cryptoassets - Chris Burniske and Jack Tatar
Blockchain Revolution - Don and Alex Tapscott
The Book of Satoshi - Phil Champagne
The Basics of Bitcoins and Blockchains - Antony Lewis
The Blockchain Developer - Elad Elrom
Blockchain and the Law: The Rule of Code - Aaron Wright, Primavera De Filippi
Grokking Bitcoin
Beginning Ethereum Smart Contracts Programming - Wei Meng Lee

You can find these books at various sources in EPUB or PDF format for free, there is no need to buy them as a hard copy, although you are free to do so.