I'm not sure. I checked a lot of books out of the library to teach myself how to fish as a kid. I distinctly remember a book - the title escapes me but it was written by Richard Alden Knight (son of John A. Knight - originator of the Solunar Tables) and was a book about FFing for stream trout and I remember reading it very carefully and I still apply some of the tactics that I remember from that book. Now that you've got me thinking about it, I think I'll search it on Amazon.
I do recommend Humphrys' "Trout Tactics."
I do recommend Humphrys' "Trout Tactics."