...died aged 69, was the author of 30 science-fiction novels and five collections of short stories and essays. His work was generally considered "hard" SF -- technologically possible and adhering mostly to scientific fact -- and his best work was an exhilarating mix of optimistic futurism and a central mystery to be solved by scientific investigation and action. ...In Voyage from Yesteryear (1982), a race which embraces individual and economic freedom proves more than a match for visiting Earthmen who wish to gain control. It won Hogan the first of two Prometheus awards from the Libertarian Futurist Society. The second,...