Hal L Corporation

Hal Leonard Corporation is a United States music publishing and distribution company founded in Winona, Minnesota, by Harold Hal Edstrom, his brother, Everett Leonard Edstrom, and fellow musician Roger Busdicker. Currently headquartered in Milwaukee, Wisconsin, it is the largest sheet music publisher in the world.

Adam Perlmutter is the author of Piano For Dummies, 3rd Edition, published by Wiley.