In the relatively nascent field of artificial intelligence, few books have had the impact that ‘Superintelligence’ by Nick Bostrom has had.  Bostrom is a Swedish philosopher at Oxford University and in a short space of time has become one of the most respected thinkers in the field.  His book is a sweeping journey through the various risks posed to society by the prospect of superintelligence - taking on each risk with the technical focus of a computer scientist, the philosophical deftness of an ethicist and the psychological skepticism of a sociologist.  This combination of viewpoints made the book a fundamental read for anyone interested in the field.  It’s widely accepted as a masterpiece.