I have a sudden urge to know everything there is to know about the Colt Single Action Army revolver. What book(s) would you recommend to get me on my way?

For technical manuals go to Brownells.For history + fun reading check out John Taffin + Mike Ventorino who both write for American Handgunner. They have both written several books;I think if you try Americanhandgunner.org. you might pull up some books.