The book 'The Future of the Professions' predicts the decline of today's professions and introduces the people and systems that will replace them. The authors argue that our current professions are antiquated, opaque and no longer affordable, and that the expertise of their best is enjoyed only by a few. They propose five new models for producing and distributing expertise in society. The book raises profound policy issues, not least about employment and about control over online expertise in an era when machines become more capable than human beings at most tasks.