John Ogdon's life and career might be summed up as prodigious. A player of great strength and protean technique, Ogdon was unafraid, and in fact preferred, to tackle the biggest scores, including Busoni's mammoth Piano Concerto, Beethoven's "Hammerklavier" Sonata, the Concerto for solo piano (from the Op. 39 Etudes) of Charles-Valentin Alkan, and the four-hour Opus Clavicembalisticum by Kaikhosru Sorabji. His repertoire was also massive: more than 80 composers were represented, with literally hundreds of scores, many of them committed to his unparalleled memory and more than 2...