This book deploys an original comparative framework, as well as archival and pattern-matching research methodologies, to analyze whistleblowing cases from Peru, South Korea, Thailand and the United States of America and to ascertain factors that make for effective whistleblowing. After examining the cases, the study concludes that external whistleblowing, extensive mass media coverage, and strong evidence are essential components of effective whistleblowing. When there is a lack of proper legal protection, whistleblowers experience brutal retaliation, even though their actions are successful in stopping wrongdoing and promoting change in the public sector.