some of the basics is still relevant today but the vast majority has been adjusted / edited;
well, the book has been published in 2012 (I have got my hands on the Polish version from 2012).
I stopped reading it somewhere in the middle, hm, I have a feeling lots of things are extremely dated and fairly s0 (for example, there is info on Internet Explorer and Flash - dead as of Jan 2021)
But still, if you come across it - it is a fine read