https://blockchainprogramming.azurewebsites.net/
https://bitcointalksearch.org/topic/book-release-blockchain-programming-in-c-part-1-926087
This is why I think, we should create more Free ebooks for people to read on the subject. I think people like Andreas Antonopoulos gets it, and he provides his older books for free on the internet. Once these books are 1 or 2 years old, most of the information is outdated in any way.
Every Tom, Dick and Harry wants to cash in on the new technology, but they give nothing back to increase adoption.