Tom Ervin is now happily retired after 36 years as Professor of Trombone at the University of Arizona and 28 years as principal trombonist in the Tucson Symphony Orchestra. He is a past president of the International Trombone Association, and was also very active as a jazz player and clinician. He is author of the widely used books Rangebuilding on the Trombone and Twenty Counterparts which are duet accompaniments to the Bordogni-Rochut Melodious Etudes. He recently completed and published his new Sixty Counterparts to accompany the Voxman Selected Studies for Trombone. Tom???s books are being enjoyed by trombonists, euphonists and tubists worldwide. Play the Counterparts books with a friend, with your teacher, and with your students.