Arrival and DepartureArrival and Departure is the third novel in Arthur Koestler's trilogy on ends and means, following The Gladiators and Darkness at Noon. It is noteworthy for being the first of the trilogy that Koestler wrote in English. The novel explores the central theme of the conflict between morality and expediency through the lens of individual psychology. The protagonist, Peter Slavek, begins his journey as a brave young revolutionary but experiences a mental