I had a conversation with Daryl earlier this year about a book. The problems are the relatively small numbers of collectors compared to the process of putting a book together. To capture a greater number of collectors I proposed a new book "Lefevers and Bakers, The Under-appreciated Guns of America's Golden Age of Shotguns".
Look for it in about 6 years.

Great-Great Grandson of D.M. Lefever
www.lefevercollectors.com