aparks517

I can say first-hand that Morse code is not just a bandwidth-efficient means of communication, but also a fun and rewarding hobby.

If you're interested in learning using modern and effective methods, I sell a course developed by an expert in memory and cognition. The first couple of lessons are available for free at https://skilman.com/try-it/ if you would like to try your hand at it and judge the course for yourself.

For anyone interested in semiconductor physics, Bob Widlar's "Introduction to Semiconductor Devices" is a delightful and accessible read.

I've found http://tvfool.com to be very useful and precise. It appears to rely on physics rather than anecdotes, but you might find it worth a try.