Exercising Agency is a book about decision making. In particular, it looks in detail at how a very important type of organizational decision gets made: whether or not to initiate a project. Mark Mullaly uses his 25 years of experience to lift the lid on many of the important behavioural factors that inform project decisions: power and politics, personality, the ‘rules’ of an organization. If you are involved in framing or making decisions about the future of your organization; the projects that you do or don’t decide to initiate, then read this book. It won’t make the decisions any easier but it will help you improve the quality of the decisions you make and over time, the effectiveness of your organizational decision making.