The Rough Guide to Reading Music and Basic Theory: The Essential Tipbook by Hugo Pinksterboer
Written in a user-friendly style, this Rough Guide Tipbook is a comprehensive introduction to reading music and to some of the principles of music theory, ranging from notes, rests and chords to staccato, diminuendo and the circle of fifths. This is a book that tells you everything you need to know rather then everything at once.