To the best of my knowledge this is the first translation of Gerke's book into English - I'd never even heard of it during my research while writing CWOL. I found the book -amazing-. 

I wrote a "little" paper, The Musical Roots of Morse Code, that combines extracts relevent to today's Morse ops with my own observations and analysis. Among other things, these extracts show that Gerke explicitly likened Morse timing to musical quarter and half notes, saw rhythmic keying as the key to clear writing, and even documents the orign of the experssio, "to work someone" in radio parlance. It's a feast.

Enjoy.

73 Chris NW6V

PS: feel free to redistribute as you please.