Basher Basics: Music created and illustrated by Simon Basher, written by Dan Green:

Basher brings his signature pop-life style to a whole new topic in this one-stop guide to the building blocks of music. Meet Rhythm and Pitch, who know how to hold a tune; Time Signature, who loves to keep control; clever Chord, who works patterns to great effect; Brass, the powerful loudmouth of the instrument types; and Classical, Pop and Electronic from a crew of sweet characters. The personality-based explanations will make it easy to remember the essential concepts behind musical expression. You'll never look at the orchestra or listen to a piece of music in the same way again