Laurence Dreyfus’s Bach and Patterns of Invention…is the first study in some time to deal above all with the reasons that music lovers ought to listen to him or play him. Dreyfus’s writing is clear and entertaining…and the advantage of [his] approach to Bach is that it makes us listen to his work as he himself listened to the music of his contemporaries, and as they would have listened to his. It does not claim to read the composer’s mind, but it reconstructs some of the processes through which he had to go to compose in each case, and it does so by referring to aural experience, leaving questions of ideology and doctrine temporarily on the side.