Also search Amazon, or ABE books.
There is much to learn way beyond book reading will tell you. Be prepared for a long learning curve. I have only made a few parts, and cannot believe how much the parts inter-depend and rely on each other not only in hardness and temper but in geometry, fit and finish. Everything needs to be just so. Only by building will you learn all the nuances necessary to make a fully functional lock. You will make many 'spare' parts along the way....
As I said, I have made some parts. But not a complete lock yet. This is something I'd like to do, too.
Tom