The Reefs of Space

by Frederik Pohl

The novel is set in dystopian future in an Earth where a computer named Plan of Man operates a harsh surveillance state. The main character is a genius scientist, Steve Ryeland, who is trying to build a new type of rocket drive. While Ryeland is struggling with amnesia, he has a computer companion named Oporto. Due to Ryeland's anti-government actions in the past, the Plan of Man Computer deems him to be a security risk, so he is forced to wear a bomb-equipped collar, which he is hoping to be able to remove.