Is the 2014 book on Yii2 up to date?

Question

Yii

Thinking of buying
Web Application Development in Yii 2 Author : Mark
Safronov

spoiler

Who has. Is it relevant today, if outdated, in what parts mainly?

Answer 1

It is 90 percent current. Of course, new methods have appeared, something has been updated, but all this is not critical. Fixed bugs, added new methods, but the old ones were not cut out. There were no major updates.
By the way, here is a cookbook from Makarov:
https://yii2-cookbook.readthedocs.io/