This book is a practical guide to understanding harmony on the guitar, with a focus on spread triads, voice leading, and arpeggio-based structures. Through clearly structured exercises and examples, it provides guitarists with tools to deepen their understanding of harmonic relationships across the fretboard. The material encourages exploration of chord inversions, various voicings, and how finger placement choices can support playability and smooth transitions between shapes. A recurring theme throughout the book is how inner melodic movement within voicings can be used to create natural connections between chords. While the primary focus is harmonic, the book also leaves space for melodic ideas. It is aimed at intermediate to advanced players and is designed to build a strong harmonic foundation while opening up creative possibilities for arranging and improvisation.