Reddit mentions of Programming Bitcoin: Learn How to Program Bitcoin from Scratch

If I may - I humbly recommend to read a proper book on bitcoin, not some fluff piece.. Just assuming from the way that you chose your post title that you might be interested in a more substantial bitcoin reading :) Please ignore if that's not the case, don't wanna ruin your reading pleasure or anything.

Economic perspective: The Bitcoin Standard - The Decentralized Alternative to Central Banking

Not technical at all, very beginner friendly, but also not a lot of practical information: The Internet Of Money

Gently technical, beginner friendly: Inventing Bitcoin: The Technology Behind the First Truly Scarce and Decentralized Money Explained

Technical deep dives:

• Mastering Bitcoin (also available for free online, as it's an open source book)
  
  
• Programming Bitcoin
  
  
• Grokking Bitcoin

There is a new book out. Programming Bitcoin from Jimmy Song
https://www.amazon.com/Programming-Bitcoin-Learn-Program-Scratch/dp/1492031496

I really like Andreas antonopoulos’ The Internet of Money Series. I support him on patreon too and have learned a ton there. https://www.patreon.com/aantonop
Jimmy Song’s programming bitcoin just came out and is good!
I also used Pamela Morgan’s cryptoasset inheritance planning to make sure my crypto is secure and my family will get it if something happens to me.

I'd say he's still around.

• I have a picture of him in my office.
  
• He's also on the cover of this book.

If you want to start to become a developer and review code than here is where to start-

https://bitcointechtalk.com/a-gentle-introduction-to-bitcoin-core-development-fdc95eaee6b8

https://bitcointechtalk.com/contributing-to-bitcoin-core-a-personal-account-35f3a594340b

https://bitcoincore.org/en/contribute/

https://bitcoin.org/en/development#code-review

https://bitcoin.org/en/bitcoin-core/contribute/

https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-July/

https://github.com/bitcoin/bitcoin/blob/master/CONTRIBUTING.md

https://programmingbitcoin.com

Learn more -

https://www.lopp.net/bitcoin-information.html

https://www.lopp.net/lightning-information.html

https://10hoursofbitcoin.com/

http://bitcoinrabbithole.org/

https://www.amazon.com/Programming-Bitcoin-Learn-Program-Scratch/dp/1492031496

https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388/ref=sr_1_6?keywords=bitcoin&qid=1564057274&s=books&sr=1-6

https://www.amazon.com/Grokking-Bitcoin-Kalle-Rosenbaum/dp/1617294640/ref=sr_1_20?keywords=bitcoin&qid=1564057274&s=books&sr=1-20