John Schippers was the director of crafts at the Connor Prairie living History Museum. When you took his classes on gun making you got a copy of the illustrations for a book on gun making he was working on. I took the class twice so have two copies. The old saying a picture is worth a thousand words well that was John, over 100 pages of hand drawn illustrations. There are designs for all kinds of things. multi leaf sights. peep sights, How to make different parts, even some on how to modify different items to set up your workshop. I don't believe he ever got the book finished but he did publish a book on engraving. John was a master at engraving and carving it was amazing to watch him do either.