The Sleepwalkers: A History of Man's Changing Vision of the Universe (Penguin Modern Classics)

Arthur Koestler (1905-1983) was an extraordinary polymath, writer and political polemicist. His most famous works include the novels Darkness at Noon and Arrival and Departure, his autobiographical writings, including Spanish Testament and Scum of the Earth, and his visionary non-fiction, including The Ghost in the Machine, The Case of the Midwife Toad and The Sleepwalkers.

John Gray has been Professor of Politics at Oxford University, Visiting Professor at Harvard and Yale and Professor of European Thought at the London School of Economics. He now writes full time. His books include False Dawn: The Delusions of Global Capitalism, Straw Dogs: Thoughts on Humans and Other Animals, The Immortalization Commission: The Strange Quest to Cheat Death and, most recently, a sequel to Straw Dogs, The Silence of Animals: On Progress and Other Modern Myths. His selected writings, Gray's Anatomy, was published in 2009.