Listed by the Guardian as one of the top 100 science fiction books of the 21st century. On the barren surface of an asteroid, located deep in the galaxy beneath the unbearable light of the Kefahuchi Tract, lie three objects: an abandoned spacecraft, a pair of bone dice covered with strange symbols, and a human skeleton. What they are and what they mean are the mysteries explored and unwrapped in LIGHT, M. John Harrison's triumphant novel.