I think I was incredibly lucky to borrow this book from the local library because it seems so rare in so many ways - the subject matter itself is bound to get some confused stares if discussed in mainstream crowds. On the other hand, if you trying to learn Morse code or curious about the amateur radio subculture, you are anything by mainstream.
Morse Code - Breaking the barrier is a informal technical composition about Morse code (MC) acquisition that concisely explains the development of the code, a treatise on the acquirement and proficiency of MC, and its application in amateur radio communications. Written by an experienced and enthusiastic amateur radio operator, the author presents his theory regarding why learning and improving in MC communications tends to plateau at 13 words-per-minute and advocates the Koch Method. In its simplest explanation, the Koch method teaches Morse by eliminating the though process of learning the code; normally "hear the code, decipher dits and dahs, review some mental chart, then write the character" to "hear the code and write it down". Depending on your tolerances and preferences for learning, the Pavlovian-response is an interesting prospective that encourages the learner not to over think the code and immediately start applying it (thus learning it).
It's a motivational book in a way but a conflict immediately arises. The book is published by MFJ enterprises, a manufacturer of amateur radio equipment, so the author heavily promotes their line of MC trainers and radio equipment with no discussion about competing products. Reading this book, you can sense the author's passion to share his hobby so it's somewhat hard to believe he could have sold out like he did.
In short, it's a good book to read for the intermediate or advanced amateur radio operator or anyone trying learn MC. The author's theory about how we learn may give you some insight into changing your thought process, which is always a good thing when it comes to learn something new. I can even forgive the subtle shilling - MFJ enterprises is still in business so they have to be doing something right.