Guitar Picking Mechanics: Techniques & Exercises for Increasing Your Accuracy, Speed, & Comfort (Book + Online Audio)

Fit For Guitar - Technische Übungen

Troy Nelson: Rhythm Guitar 365 Daily Exercises for Developing Improving Rhythm Guitar Technique | Guitar Instruction Book with Online Audio | Strumming Fingerpicking Chords Practice for All Levels

The Christopher Parkening Guitar Method - Volume 1. Includes Audio Online: The Art and Technique of the Classical Guitar

Complete Technique for Modern Guitar: Develop perfect guitar technique and master picking, legato, rhythm and expression (Learn Guitar Theory and Technique)