WThe Act of CreationWArrow in the BlueWDialogue with DeathWThe Ghost in the MachineWThe God that FailedWThe Heel of Achilles: Essays 1968–1973WThe Invisible WritingWJanus: A Summing UpWThe Lotus and the RobotWThe Roots of CoincidenceWScum of the Earth (book)WThe Sleepwalkers (Koestler book)WSpanish TestamentWStranger on the SquareWThe Thirteenth Tribe
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