"Evaluation Roots: A Wider Perspective of Theorists' Views and Influences, Second Edition, provides a contemporary examination of evaluation theories and traces their evolution. Marvin C. Alkin shows how theories are related to one another, especially in terms of how new theories build on existing ideas. The way in which these evaluation "roots" grow to form a tree helps provide readers with a better understanding of evaluation theory. In addition to the editor's overview, the book contains essays by leading evaluation theorists that describe the evaluators' personal theories and how they were developed."--Publisher's website.