A review of The Historical Development of Quantum Theory, Volume 5; Erwin Schrödinger and the Rise of Wave Mechanics. Part 1 Schrödinger in Vienna and Zurich 1887–1925, and Part 2 The Creation of Wave Mechanics; Early Response and Applications. By Jagdish Mehra and Helmut Rechenberg. (Springer, 1987.) Part 1 [Pp. xviii+336.] £32·40 ISBN 3540 96284 0. Part 2 [Pp. 367–980]. £48·50. ISBN 3540 96377 4. This volume is dedicated to the memory of Erwin Schrödinger (1887–1961) on the centenary of his birth.