The World Jones Made, Philip K. Dick
This had some fairly interesting ideas. A society in which you can say anything you like as long as it's provably true. Human mutants that had been created as a result of a war, one of whom could accurately predict the future. He experiences his life one year before it happens, the present day is already an old memory for him. In a side story mutants are being deliberately created to colonise Venus. Then there are the alien "drifters". However the exploration of these ideas is patchy and I left the book thinking something was missing.
