The first second-hand copy of "The Organette Book" has been
seen for sale on USA eBay:

  The Organette Book. Copyright March 2002. Hard cover and in
  excellent condition. 417 pages with some color photos and many
  illustrations. An extremely comprehensive reference guide for
  the Organette, a self-playing reed organ. Publications committee:
  Music Box Society of Great Britain.  Author: Kevin McElhone.

Originals are still available direct from myself!

Kevin McElhone
Northampton, England