Book excerpt: Nowadays, a considerable amount of evaluation work is implemented internally—both nationally and across the world. As such, it is exceedingly important for evaluators and organizations to be aware of the issues in designing and implementing internal evaluation to realize its potential for enhancing organizational growth, competitive advantage, and social impact. This issue includes perspectives on internal evaluation from experienced evaluation practitioners from different fields and organizations who share theoretical and practical examples and case studies in promoting and conducting internal evaluation. The chapters: Highlight societal and organizational changes that have shaped the current trends in internal evaluation Discuss foundational issues in internal evaluation Provide rich illustrations of internal evaluation practice in different settings with diverse foci (customer-driven vision and a results-based orientation for evaluation, accountability and development, and building evaluation capacity). This is the 132nd volume of the Jossey-Bass quarterly report series New Directions for Evaluation, an official publication of the American Evaluation Association.