Anne: I was just going by what is on the Volhard website (www.volhard.com/general/publications.htm) which says that the book is out of print. It is possible that Amazon has it in inventory, but once that is gone, it is gone.
The following is on the Volhard website: "The Canine Good Citizen: Every Dog Can Be One Jack and Wendy Volhard, Howell Book House, 1994. Named Best Care & Training Book for 1994 by the Dog Writers' Association of America. Great way to get started. (Out of print)