Mostly Read: The Gun Digest Book of the AR-15. Volume 2 by Patrick Sweeney, 2007, 9780896894747.
Not as good as Volume One. In Volume One Sweeney wrote that Volume Two would be more about building an AR. Not the case. Sweeney continues writing more about accessories and manufacturers but does give some interesting info I had not seen elsewhere. As pointed out by a commenter on Amazon there are a lot of typos and errors throughout the book and it looks as though this was rushed to press.
I was hoping for more detailed information and illustrations on building and maintenance. I suppose I could order an Army field manual.