Nowlen publishes Keys to Transposition
Keys to Transposition teaches a step-by-step, strategic approach built on key and starting from scales, arpeggios, and common patterns. It has several “failsafes” to prevent students from going wrong, and each unit includes excerpts from the orchestral, solo, and chamber repertoire, starting with passages with no accidentals and few leaps and gradually adding difficulty. Each standard key also includes at least one duet excerpt. It is good material for the advancing high school or early college student, and potentially an excellent first excerpt book.