Apart from writing music, Keith Harris writes articles, mainly to do with the mandolin, for various journals.
Something he, at least, regards as important, is his educational book The Mandolin Game, which treats basic principles of mandolin playing in great detail and in a way that has never been done before. People who know the book are divided into those that think it is wonderful, and, not suprisingly, those who don't. Very high praise has come from the great Russian domra (a cousin of the mandolin) player, Tamara Volskaya. She wrote:
"We have never had anything like it. It is essential for every mandolin player, and in fact for anybody who plays a plucked string instrument."
The book is published by Trekel of Hamburg in both English (TB 2010) and German (TB 2009).