In 1929 Paul Wittgenstein, a pianist and war veteran who lost his right arm in the Great War, commissioned Maurice Ravel to write a concerto for him to perform. The result was one of Ravel's most thrilling compositions and, for Wittgenstein, the most important of the many works he commissioned over the course of his career. This scholarly-critical edition of Ravel's Concerto for the Left Hand is based on previously inaccessible and unknown sources.

The editor, Douglas Woodfull-Harris, was abl...