# The Sleepwalkers

> essay by Arthur Koestler

**Wikidata**: [Q1151691](https://www.wikidata.org/wiki/Q1151691)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/The_Sleepwalkers:_A_History_of_Man's_Changing_Vision_of_the_Universe)  
**Source**: https://4ort.xyz/entity/the-sleepwalkers-q1151691