If things work out, there will be another one in a few months. Some of the passages will be familar to readers of the first book but it will quickly become evident that it is extensively re-written and expanded. The manuscript is submitted. This one will be focused on revolvers with more models covered, more loads and load variations, more history. This time, I've set up the pictures to cover one half page to a full page, mostly eliminated the cutesie cantebury font and made the lettering on the graphics larger. There is an appendix of sources for guns, parts and loading components. Several people thought that was needed. I was reluctant to put it in the first book because industry shifts will make it obsolete fairly soon.
It will also go for a (expensive) line edit to get the spelling and punctuating right. The word count is higher and I believe it will be thicker- though there aren't as many illustrations.
Since it is an assisted self publishing effort, there is nothing more I can do about the low-tech, black and white illustrations. I will try to stress that It is Not a picture book and those wanting a coffee table volume will be better off with R.L Willson or something from Krause Publications.
The one in circulation now has seen some steady custom in England and at least blipped the charts in Germany, France, Canada and Japan. I heard from a guy in Hungary who bought one last month. It's been picked up by the Smithsonian Library-probably because it is pretentious enough to have an index and bibliography. I did a search there and found they had titles by Keith, Askins and Cooper but nothing much else from the gun press for the last thirty years.