Beethoven's works for solo piano – the sonatas, variations, and bagatelles – and the five concertos for piano and orchestra stand at the heart of the repertory. Beethoven's Piano Music: A Listener's Guide, by Victor Lederer, will help the motivated reader understand this popular but often knotty music. The bulk of the text consists of a movement-by-movement analysis of the 32 sonatas, fascinating for their individuality and for the way they trace...