Everything You Need to Know in an Easy-to-follow Format! By Andrew Surmani, Karen Farnum Surmani, and Morton Manus. Over 220 pages of easy-to-understand theory lessons! AlfredÂ's Mini Music Guides provide essential information in a convenient size. Take these books anywhere you want to go. Designed for students of any age who want a better understanding of the language of music, Music Theory Essentials is the most useful compact theory method available. Features include: A simple and practical approach to theory for music enthusiasts and musicians, Lesson reviews with answer keys, Breaks down the essentials of music notation, Covers intervals, scales, modes, chords, diatonic harmony, and transposition, Shows you how to compose and harmonize a melody in major and minor keys, Comprehensive sections on arpeggios, passing and neighboring tones, the blues, and much more !