A.J. Dunning (1930-2009) was Professor Emeritus of Cardiology at the University of Amsterdam. He wrote Broeder ezel (‘Brother Donkey’, 1981), about the limitations of medicine, and Uitersten (‘Extremes’, 1990), about extreme forms of human behaviour. The latter sold more than 50,000 copies in less than a year. In 1997 he published Stof van dromen (‘The Stuff of Dreams’), a history of dreams, concepte and evolutions.