″Klaus Heizmann's collection is a wonderful new resource of ideas and techniques: practical, varied, challenging, relaxing and stimulating. I am always looking for new ideas, as I like to use a different set of warm-ups at every rehersal with my choirs, and I tend to choose specific exercises to suit the repertoire for the day. This collection gives us 200 excellent “tools-of-the-trade”; they are clearly lebeled, intelligently set out, well-designed and extremely useful.″ – Simon Carrington, Director of Choral Activities, New England Conservatory since 2001, Director of Choral Activities, The University of Kansas 1994-2001, and founder and co-director of the King's Singers 1968-1993