Kepler

NOTE

The standard biographies are Kepler, by Max Caspar, translated and edited by C. Doris Hellman (London, 1959), and Tycho Brake, by J.L.E. Dreyer (Edinburgh, 1890). I must also mention, once again, my indebtedness to, and admiration for, Arthur Koestler's The Sleepwalkers (London, 1959). Another work which provided me also with valuable insights into early 17th-century life and thought is The Rosicrucian Enlightenment, by Frances A. Yates (London, 1972).

For their help and encouragement, I wish to thank especially Don Sherman and Ruth Dunham, and my wife, Janet.

Johannes Kepler died in Regensburg on November the 15th, 1630.