The authors' first book, Nonprofit Sustainability: Making Strategic Decisions for Financial Viability introduced a new framework to help leaders address the challenges inherent in balancing mission impact with organizational sustainability.  Based on the premise that in order for nonprofits to be financially and programatically sustainable, they must combine their financial and programatic goals in an integrated strategy, the authors introduced The Matrix Map, a powerful decision-making tool which they adapted from BCG's Growth-Share Matrix and other matrix tools, including the McMillan Matrix and the TOWS Matrix.