This book was written at a time when very few "trigger" books existed, and it is still an excellent resource to this day. It is intended for players switching from straight tenors to those with triggers, a commom occurence at the middle and high school level. The etudes focus entirely on F trigger technique, without the added burden of other technical issues. The exercises teach C, B and Bb in the staff, as well as F, E, Eb and later, D, below the staff. All exercises are practical and are written in a way that helps foster mastery. Mainly intended for tenor trombone, but can be used for young, first-time bass players as well. -cdp