Internationally known Welsh composer Alun Hoddinott has played a major role in the promotion of contemporary music in his country through his own prolific compositions--operas; orchestral, chamber, band, and solo instrumental pieces; choral music; songs; and incidental music--and as a professor of music at Cardiff University and artistic director of the Cardiff Festival of Twentieth-Century Music. This bio-bibliography includes a catalog of his works, classified by genre, which documents 278 compositions (plus numerous derived pieces) composed from 1946 to 1991, indicating commissioning, dedication, instrumentation, duration, manuscript information, publication, recordings, and premieres and selected performances. The works catalog is cross-referenced to recordings in a discography section and to related items in an annotated bibliography, which includes a large number of reviews and writings by the composer. An introductory biography, appendices listing the musical compositions alphabetically and chronologically, and a general index complete the volume. Prepared with the full cooperation of Hoddinott, this is the first detailed publication on this important composer.