Here's a little gem for all you aviation history buffs, Claude Graham-White's 1916
Learning to Fly
A Practical Manual for Beginners
Learning to Fly by Claude Grahame-White and Harry Harper - Project Gutenberg
It's free and downloadable with diagrams and pics.
The Gutenberg project has come up trumps with this one, and if you enter TL into the LoCC line in its search function you'll come up with a few more fascinating early aviation books too.