PS - I also play the monochordal Gusle, one of two instruments that get called Horse-Head Fiddles, the other being the Mongolian Morin Khuur. Both traditionally have strings made of twisted horse-hair, both have carved horse heads as an integral part of the design, neither would be called the fiddle by an English speaker.

This looks like an interesting read, but at $95 for a mere 188 pages I'll put it on my car-boot wish list.