This text investigates the foundational juridical concepts and practical implementation of international criminal law within the broader framework of public international law. Roger O'Keefe, a recognized scholar in the field, utilizes a combination of treaty analysis, institutional examination, and national implementation studies to construct a comprehensive overview of the discipline. The work argues that understanding international criminal law requires moving beyond the study of specific court cases to examine the formal legal structures that define international crimes and state obligations.

Experts and practitioners frequently cite this work as a foundational resource for understanding the formal legal architecture of the field. Readers often note the academic density and precision of the prose, which makes it a standard reference for those engaged in the study or practice of international criminal law.