Dazzling...wrenching...a mind bender. --Time Brain-boggling. --Life Full of poetry, scientific imagination, and typical wry Clarke wit. By standing the universe on its head, he makes us see the ordinary universe in a different light...[This novel becomes] a complex allegory about the history of the world. --The New Yorker Clarke has constructed an effective work of fiction...with the meticulous creation of an extraterrestrial environment, the sort of extrapolation of which Mr. Clarke is a master. --Library Journal Breathtaking. --Saturday Review