The Fiddler's Fakebook, selections and arrangement by David Brody.  The ultimate sourcebook for the traditional fiddler. Published by Oak.

Edly’s Music Theory for Practical People is the book that makes learning theory easy and fun—or at least, easier and funner. It’s written for anyone, teen to adult, wanting to understand what’s going on inside music, regardless of musical style or instrument: rock ‘n’ rollers wanting to broaden their musical horizons, jazzers needing more knowledge of chords and scales, theory students needing supplementary help, or classically trained folks wanting to better understand their Chopin… or branch into popular styles or read from fake books.