The author uses an easy-to-understand framework to describe the expectations of public service users in society, both today and in years past, and, the motivations of agencies that act as providers of these services.
Examples mainly drawn from education and healthcare in the UK show an increasingly informed public that demand greater accountability and value for money from service providers (from Pawns to Queens). From this customer-driven evolution there appears to be an increasing realisation that those who provide services to the public do so with a wide spectrum of different motivations (from Publicly-Spirited Knights to Self-Interested Knaves).
Interestingly, the author finds that characteristics of both 'knightly' and 'knaveish' behaviour in combination may indeed yield the greatest benefit for society. The 'robust' strategy / policy therefore becomes one where altruism and self-interest align, a point where society benefits the most from the efforts of the publicly employed agent(s).
It is in matters of policy execution, however, that the book probably falls a little short. Description of how you might identify and implement 'robust' strategy is high-level and hard to visualise, via, an action plan, for example. An example of a 'robust' strategy was provided from public housing but was not particularly well specified. The ideas the book presents clearly outweigh the policy implementation path attempted.
Policy implementation and the small font with which the book has been printed are the only drawbacks. Otherwise it is well written, well researched and an important contribution of ideas to those engaged or interested in public policy.