Hawksbill Station Author:Robert Silverberg In the mid-21st century, time travel is used to send political prisoners to Hawksbill Station, a prison camp in the late Cambrian Era. When the latest arrival suspiciously deflects questions about his crimes and knowledge of 'Up Front', the inmates decide to find out his secret.
Silverberg, in my opinion, is one of the best sci-fi authors from the 60's and 70's. I have read several of his novels and am never disappointed in them. This one was no exception. The concept of sending political prisoners back in time a billion years to the Cambrian age before any life had evolved on land was very interesting and evoked a Russian Gulag or a futuristic Guantanamo Bay! The politics got a little tedious and probably read better when this book was first written in the 60s. However, some of Silverberg's insights into the future were quite remarkable including an inconclusive presendential election with regrettable results.