New edition of David E. Young's book
Webpage here. I can tell you that his original "The Origin of the Second Amendment" was a breathtaking work of research. Which may explain why the Emerson court cited it over a hundred times!
I've been permitted to see the page proofs for his upcoming second book, which will be out in mid-December, entitled "The Founders' View of the Right To Bear Arms," and it is a stunning work, with many expansions on the first.