in economics from Exeter College, Oxford University, and a MPP and Ph.D in Public Policy Analysis from the Harvard Kennedy School.
[3][4] Zook is an author of books and articles on business strategy, growth, and the importance of leadership economics, including the Profit from the Core trilogy.
Unstoppable completes the series and examines what to do when a previously viable growth formula of the past begins to approach its limits, and how companies can change their strategic focus and redefine their core.
In 2010, Harvard Business School press published an updated version of Profit From the Core, subtitled "A Return to Growth in Turbulent Times."
The updated edition describes how principles from the trilogy enabled companies to continue growing during the global financial crisis that began in 2008.