Jehan Alain left numerous manuscripts representing several versions of each organ pieces. For ten years, Marie-Claire Alain comparatively studied the various versions and documents, and has compiled a book which follows the harmonic and rhythmic evolution of the young composer and his concern for tonal color as expressed in evolving registrations. The performer may remain faithful to the music and also choose among the variants suggested by the composer.

Originally published by Alphonse Leduc, now carried by Hal Leonard Publishing; 121 pages, softbound