Best Flask Books (2019)
Considering how popular the Flask Web Framework is, there is shockingly little educational content available when it comes time to learn it.
In practice there are only two up-to-date, highly recommended books. The first one is available on Amazon but the second is an online-only book.
A comprehensive beginner-friendly tutorial. Also available online.
An intermediate-level guide to full-stack Flask from the creator of Real Python. An amazing resource.
There are also two excellent and free online guides: