I have worn the covers off of several books. Kindig's Thoughts on the Kentucky Rifle in the Golden Age, Rifles of Colonial America Volume 1 and 2, and the Buchele/Shumway book on building rifles are the most worn. I got all those in the 1970's (Buchele and Kindig) and 1980's (RCA) and not a month goes by that I don't consult Kindig or RCA. Now the new Grinslade Colonial Fowlers is taking a beating.
I've been poor and when I was, I did without luxuries and hobbies or found a work-around. I think we are discussing a work-around here for folks who decide they cannot afford the books, but have decided they can buy parts to build a gun. Parts for a gun will run between $450 and $850 depending on what you are building and how much work you get done (precarves, etc) versus parts you make and work you do. If you spend $300 on books you'll have a better investment that will last through building dozens or hundreds of guns. The Grinslade book can be had for $38.00. I'd suggest, don't ask me about fowling pieces till you buy it and study it. When I say that, I'm telling you that book has hundreds of times the information I could give you, and you could have it at hand every moment.
In general folks are very helpful on this forum, and suggesting someone do their homework or invest a little something before taking other folks time for granted isn't out of line to me.
Things you will never find on a forum or online: the data you get in RCA 1 and RCA 2. You will never find a place with a couple hundred original rifles, organized into schools, photo'd from different angles, with a historical perspecitve, and measurements useful for the builder. There is a lot in our archives here of antique rifles, but not the measurements etc nor the access to many "keystone" rifles.