The written proceedings of the Foundation’s 2011 Colorado River Symposium, “Solving the Basin’s Math Problem: Adapting to Change.” This two-and-a-half day, invitation-only event held in September 2011 brought together some of the top policymakers in the Colorado River Basin. Symposium discussions focused on realities associated with water supply and demands; hydrological and political drivers of change; the Colorado River Basin Study; adapting to increased costs and determining who pays; cross-border issues between Mexico and the United States; and adapting to climate change. A closing session was devoted to what will happen if efforts to conserve, augment and share water within the Basin do not succeed. This 144-page, softbound book is a vital resource for universities, libraries and law schools, and a must-have for the serious Colorado River scholar. Bonus: the 2011 Symposium Proceedings includes a disk with the speaker PowerPoint presentations.