In an increasingly crowded market of trumpet methodology, Dan Rosenboom has produced something quite creative, unique and diabolically challenging. It may sound cliché, but this book really does offer something for players of all levels. Dan is a great all-around trumpet player in high demand in Los Angeles, and now he’s provided a peek into how he has attained his freakish skills. He has gone into great detail to describe exactly how these exercises should be approached, so the conscientious student should be able to realize quantifiable progress if they exercise discipline and restraint. Highly recommended. - quote, Jim Wilt
