Arpeggio and Scale Resources is a free eBook that covers guitar scales and arpeggios. The book is divided into three parts: a short “Fundamentals” section, and two longer sections that contain advanced resources. The book is over 400 pages long and includes diagrams and analysis.
You can download the book as a PDF or read it online. It has a creative commons license, so it’s free to download.
You can find the book at: Cochrane Music, Scribd.
An arpeggio is a broken chord, or the first, third, and fifth notes of a scale played in succession.

FREE Arpeggio and Scale Resource P.D.F Book by Rich Cochrane