’This is an ambitious and illuminating book, based on broad and deep knowledge of the international literature, and grounded in practical engagement in research. Without offering a grandiose overview, in a series of essays Hans Christian Garmann Johnsen makes valuable links between social theory and the new challenges of the knowledge society. Readers will find familiar starting points, and new connections.’ Richard Ennals, Kingston Business School, Kingston University, UK ’It is a commonplace that knowledge is a social phenomenon. However, in this far-reaching and learning treatise, Hans Christian Garmann Johnsen explores the sociality of knowledge in a way that goes very substantially beyond the sociology of knowledge. Johnsen’s exploration takes him from Dilthey and Husserl to Hayek and Popper to Argyris and Richard Florida. Many new and fertile ideas are suggested when Johnsen wrestles with the thoughts of intellectual giants, past and present.’ Nicolai J. Foss, Copenhagen Business School, Norwegian School of Economics and Warwick University