Although Stephen Sondheim (1930- ) has a reputation for penning songs that people cannot sing along with, few would deny his unique place in American theater history. Beginning with early collaborations with Leonard Bernstein on West Side Story and Jule Styne on Gypsy, Sondheim’s passion to control both words and music have culminated in works such as Sweeney Todd, Sunday in the Park with George, and Into the Woods; and a new theatrical format: the concept musical.