Joeri has written books and tutorials, very specific for Leica users.
Thank you for writing “Work your Leica M.” After nearly a lifetime of using single lens reflex cameras, I finally turned to a Leica rangefinder. Taking pictures with the Leica a joy and a challenge. My eyes are not what they used to be, and even with corrective eyepiece lenses, I need to continue to improve my ability to focus. Your book and it’s recommended training is working. I am most grateful.