Composing Music by William Russo

I have tasked myself with staying one step ahead of my students as we work our way through William Russo's book, Composing Music

"Aimed at those who have some knowledge of music but not formal training in composition, this concise introduction to composing starts right in with a brief composition exercise, then proceeds step by step through a series of increasingly complex and challenging problems, gradually expanding the student's musical grammar." 

Yes, please! Let's go!