Even an original edition would be great. Thanks in advance. Although as teachers we try to get it right with our students the first time, imperfections and errors invariably creep in and, if allowed to go on uncorrected, can soon develop into bad performance habits. Once learned, technique is automatic and habitual and therein lies the problem. By the time you've realised what you've done wrong, it's too late to stop.
Habits are hard to correct using conventional re-teaching methods.
You need a different approach that deals with learned errors or habit errors, as they are sometimes called. I have worked with different musicians who had technique and other performance problems or who faced having to adapt to different instruments or different teachers, using the Lyndon Method, a new approach to changing habit-based performance difficulties. This work is based on the proactive habit interference research of the American psychologist Benton Underwood, which although it is now somewhat unfashionable has never been challenged, so we are dealing with a real phenomenon here. I have a list of published research on the Lyndon Method for those who would like to learn more about it. This includes a comparative methods experiment research report funded by the Australian National Training Authority.