AWS and Cloud computing are really hot topics and it's hard to get the right information by just reading around the web. Q&A websites are great if you can learn

AWS and Cloud computing are really hot topics and it's hard to get the right information by just reading around the web. Q&A websites are great if you can learn by asking isolated questions - how do I sum 2 columns in python pandas? - but terrible if you need systemic knowledge - how much will I have to pay if I migrate my 90's era "enterprise" BI on premise systems to AWS? I think that such "ebooks" written by credible professionals could easily charge $500 or $5000. I am not surprised this ebook is so successful because it provides systemic knowledge on a really valuable platform at a very reasonable price. And by the way, the only other 2 paths you can take as a company to evaluate something like AWS are 1) trusting AWS tech sales; 2) trusting xyz consultant. On point 1 you clearly have a bias and even without the bias you could be talking to a company selling a technology that is a bad fit for you (like all those trying to do BI with a Cloudera stack). On point 2 you can find consultants expert in AWS or xyz tech stack, but it's harder to find professionals that know the technology of the present day AND also can make good guesses at where tech is going to be 5 years from now. On top of all consultants are paid to be confident and that's exactly what you should avoid, you should be selecting technology knowing that things might change.