A novel of time-traveling adventure from the author of the story "Supertoys Last All Summer Long," the basis for the movie A. I.: Artificial Intelligence. Winner of two Hugo Awards, one Nebula Award, and named a Grand Master by the Science Fiction Writers of America, Brian W. Aldiss challenged readers' minds for over fifty years with literate, thought-provoking, and inventive science fiction. In the year 2093, human consciousness has expanded to the point that man can now travel to the past using a technique called "mind-traveling." Artist Edward Bush returns from a nearly three-year mind-travel to find that his government has crumbled and society is now under the leadership a new regime. Given Bush's experience, he is recruited by the regime to track down and assassinate a scientist whose ideas threaten to topple everything they've built.