What I read:
The Barista Hustle by Matt Perger
CRS Coffeelands Blog by Michael Sheridan
Colonna & Small’s by Maxwell Colonna-Dashwood
Jimseven by James Hoffmann
Kaffeemacher-Blog by Benjamin Hohlmann, André Strittmatter, Philipp Schallberger and a few other Swiss coffee professionals. Their blog is the true Swiss coffee portal – everything you need to know about coffee you will find in their site, provided you know German.