![The Sleepwalkers: A History of Man's Changing Vision of the Universe is a 1959 book by Arthur Koestler. It traces the history of Western cosmology from ancient Mesopotamia to Isaac Newton. : The Sleepwalkers: A History of Man's Changing Vision of the Universe is a 1959 book by Arthur Koestler. It traces the history of Western cosmology from ancient Mesopotamia to Isaac Newton. :](https://external-preview.redd.it/8245KdYRr9mcZPpNGH-n3_Pzd1dZ750TRPdMSaD-za0.jpg?auto=webp&s=cc35167c4eec9e402d6694e03c89b06ed1f2a7c6)
The Sleepwalkers: A History of Man's Changing Vision of the Universe is a 1959 book by Arthur Koestler. It traces the history of Western cosmology from ancient Mesopotamia to Isaac Newton. :
![File:Arthur Koestler by ImreVarga, MOL Bubi docking station, 2018 Terézváros.jpg - Wikimedia Commons File:Arthur Koestler by ImreVarga, MOL Bubi docking station, 2018 Terézváros.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/5/55/Arthur_Koestler_by_ImreVarga%2C_MOL_Bubi_docking_station%2C_2018_Ter%C3%A9zv%C3%A1ros.jpg)
File:Arthur Koestler by ImreVarga, MOL Bubi docking station, 2018 Terézváros.jpg - Wikimedia Commons
![The double life of Arthur Koestler, intellectual and sexual adventurer | Arthur Koestler | The Guardian The double life of Arthur Koestler, intellectual and sexual adventurer | Arthur Koestler | The Guardian](https://i.guim.co.uk/img/static/sys-images/Guardian/Pix/pictures/2010/2/20/1266695050046/Arthur-Koestler-001.jpg?width=465&quality=85&dpr=1&s=none)
The double life of Arthur Koestler, intellectual and sexual adventurer | Arthur Koestler | The Guardian
![File:Arthur Koestler opende tentoonstelling in galerie Mokum van kunstwerken gemaakt , Bestanddeelnr 922-0070.jpg - Wikimedia Commons File:Arthur Koestler opende tentoonstelling in galerie Mokum van kunstwerken gemaakt , Bestanddeelnr 922-0070.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/a/a6/Arthur_Koestler_opende_tentoonstelling_in_galerie_Mokum_van_kunstwerken_gemaakt_%2C_Bestanddeelnr_922-0070.jpg)