Guitar Modes by Encore Music Books is a 91 page book consisting of a total of 168 scales throughout all twelve keys. The modes presented in this book are: Ionian Dorian Phrygian Lydian Mixolydian Aeolian Locrian If you are unfamiliar with modes, within the first couple of pages you will find an introduction that clearly and easily explains exactly what modes are, as well as the anatomy of all 7 versions. In an effort to help you master the entire neck of the guitar, two variations of every scale can be found on each page. At the top of the page are the combined notes of both scales as presented on the staff. The notes to be played are shown in tab version, as well as the finger and fret placement on the neck of the guitar.