Several years ago I published Taekwondo Forms – Unam, which is a supplementary text to Taekwondo Forms, and which looks at the Changheon-yu form Unam – a precursor to the modern-day Chungjang.
This book is available on Amazon here, but because the book is quite short, Amazon doesn’t show you much of what’s inside it (and it’s quite difficult to describe), so if you’re interested in the book, but want to see more of what’s in it before buying it, here is a preview of the first twelve pages of the book.