Are alien civilizations really possible? If extraterrestrials exist, where are they? How likely is it that somewhere in the universe an Earth-like planet suppor

Originally published in Great Britain by Profile Books Ltd, 2016.

What would life on other planets look like? Forget the little green men, alien life is likely to be completely unrecognisable -we haven't even discovered all th

A thoughtful, clear and utterly fascinating reference, this book is absolutely vital to writers who want to put extraterrestrial life-forms in their novels and

How and when does there come to be an "an­thropology of the alien?” This set of essays, written for the eighth J. Lloyd Eaton Confer­ence on Fantasy and Sci