Flask books?

Question

Flask

To learn Flask, I want to buy a book (or a couple of books) , but the choice is not very large.
Therefore, the question arose among connoisseurs and experts - how fast is Flask developing and how relevant will the 2016 book "Developing web applications using Flask in Python" by Miguel Greenberg be?
As I understand it, the book describes Flask version 1+, and version 2 has already been released, and I would like to know from experts in Flask - how many changes, and how relevant will the 2016 book still be? Or is it still better to find at least in PDF, but fresher?

Any answers and advice are accepted.

Answer 1

The book is very sensible, intelligibly explains the basic principles and approaches that have remained unchanged. Over the past years, in my opinion, basically all sorts of little things have changed, which are easy to learn from the documentation. The biggest change is asynchrony, but this topic is not for beginners.