Watched from a safe distance, Arthur Koestler's life was like a Catherine-wheel breaking free from its stake. Leaping and spinning and scattering crowds, emitting fountains of alarming flares and sparks as it bounded in and out of public squares and unexpected back gardens, flinging dazzling light into dim minds, Koestler's career left scorch marks and illuminations across the 20th century. When it finally stopped and the flames died, the darkness suddenly seemed absolute.

LRB 22 April 2010 | PDF Download