Sorry not sure what books would be good (I learnt the bits and bobs I know mostly on the job from grey-beards!) but I always like to chime in when people talk about black magic that part of learning about RF it's not that crazy - just unintuitive if you think in terms of the lower frequency and DC stuff - because once you lean about it, it basically turns out that really low frequency stuff and DC are basically a special case of RF, and you can see the RF effects in all sorts of things, like any decently fast UART or other signals.

So yeah, I would encourage any EE to look into it, because having an idea about RF can make any electronic design better (especially around things like EMC!)