This book offers the first comprehensive introduction to Results Mapping, an in­ novative approach for assessing the worth of hard-to-evaluate social, health, and education programs. Results Mapping represents a true milestone in program evaluation-a milestone both as methodology for program accountability and as a technique for program improvement. It is relevant across a wide spectrum of pub­ lic health, social service, and systems-building initiatives. It introduces "new sci­ ence" into the field of program evaluation. It merges common sense with structured logic. It retains the richness of real world success stories without sacri­ ficing a hard-nosed focus on quantitative data and measurable outcomes. The contents of this book are directly pertinent for program leadership and staff, for sponsors and funders in the public and private sectors, and for those charged with assessing, documenting and analyzing the effects of program activ­ ity. Success Stories as Hard Data is designed to be readable, practical, and clear. Its author does not ignore previous scholarly work, but chooses to emphasize real­ world applications. For this Dr. Kibei is to be applauded.