Sir Arthur Stanley Eddington (1882–1944) was a key figure in the development of modern astrophysics, who also made important contributions to the philosophy of science and popular science writing. The Arthur Eddington Memorial Trust was set up after his death in order to hold annual lectures on the relationship between scientific thought and aspects of philosophy, religion or ethics. This 2012 collection gathers together six of these lectures, including contributions by Sir Edmund Whittaker, Herbert Dingle, Richard B. Braithwaite, John C. Eccles, Dame Kathleen Lonsdale, and Baroness Mary Warnock, together with Eddington's 1929 Swarthmore Lecture on Science and the Unseen World. A preface written by the Astronomer Royal, Baron Rees of Ludlow, is also included. This is a fascinating book that will be of value to anyone with an interest in the philosophy of science and Eddington's legacy.