This book examines mass shootings and attempted shootings that occurred across 16 countries in Central and Eastern Europe, known as post-communist states. This region of the world has been described by social scientists as possessing specific social, cultural, and political characteristics which may mean that mass shootings in this part of the world are driven by distinct causal factors in comparison to those in North America and elsewhere. This book explores trends and patterns that underpin cases in this under-explored region and tests whether Cumulative Strain Theory can account for mass shooting occurrences. It uses in-depth qualitative analysis to examine select case studies in one chapter, followed by a chapter which uses quantitative methods to identify trends across a wider set of cases and to test the theoretically-driven hypotheses. This data is then compared with data in the US. This book draws on a wide range of media, forensic and court reports and provides methodological insights and discussions of future trends including the potential incidental increase of mass shootings in these regions. It also engages in recent public policy debates pertaining to firearm ownership and regulation.