vanhees71 said:
Purcell, in my opinion, hides the beauty of the relativistic approach by avoiding the Minkowski-space formalism in an attempt to be didactical by avoiding apparently "complicated math" at all costs.
Purcell's text is volume 2 of the Berkeley Physics series (
https://en.wikipedia.org/wiki/Berkeley_Physics_Course ), which was written in the 1960s.
Purcell could be used as an
intermediate level EM text in some places (as it was for me as a college student) or as an
introductory honors course for majors in other places (as it was when I was a teaching assistant).
This is my experience and my understanding for schools in the US.
The previous volume in the series was Mechanics by Kittel and did introduce relativity near the end, but not with any Minkowski spacetime viewpoint. So, that would not be enough to use in Purcell.
It seems to me that the only "introductory level" texts from that era that discussed the Minkowski-spacetime was Taylor and Wheeler's Spacetime Physics (from MIT/Princeton) and French's Special Relativity (MIT Introductory Physics series).
So,
it's not just Purcell... it's practically all introductory textbooks that avoid Minkowski spacetime.
From what I have seen, Tom Moore's Six Ideas that Shaped Physics (
http://www.physics.pomona.edu/sixideas/ ) is the first modern introductory text/sequence that discusses and advances the spacetime viewpoint. Using his unit R then unit E, electromagnetism is treated with an underlying theme of relativity.