What to read after Copenhagen?

In 1941 the German physicist Werner Heisenberg made a strange trip to Copenhagen to see his Danish counterpart, Niels Bohr. They were old friends and close colleagues, and they had revolutionised atomic physics in the 1920s with their work together on quantum mechanics and the uncertainty principle. But now the world has changed, and the two men are on opposite sides in a world war. The meeting was fraught with danger and embarrassment, and ended in disaster. | Includes a lengthy postscript (p.79-112) and post-postscript (p.113-128) by the playwright providing background to the historical context of the play and Frayn's response to some of the criticisms he received after the initial performances in England and New York.