This volume offers the first comprehensive study of the law of international crimes as applied by the ad hoc Tribunals for the former Yugoslavia and Rwanda. It contains a comprehensive and detailed analysis of the law of war crimes, crimes against humanity, and genocide, as identified by these two tribunals. `Review from previous edition Mettraux has produced an essential volume that belongs on every international criminal law bookshelf. His grasp of the material is unequalled, a wonderful blend of knowledge that comes from years of working inside the system, but always presented with a welcome degree of scholarly detachment. The analysis is full of insights, some of them controversial and provocative. The book is beautifully written, and packed with helpful references.' Professor William A. Schabas, Director of the Irish Centre for Human Rights at the National University of Ireland`A masterful exposition of the ICTY and ICTR case law. The wealth of jurisprudential material is extremely well organized and set out clearly and concisely. An indispensable tool for both practitioners and scholars.' Professor Antonio Cassese, University of Florence`...invaluable to students of international criminal law. The approach...will provide useful information for the future...The value of the book is enhanced by the author's considerable experience as Associate Legal Officer of the ICTY who now often acts as Defence Counsel...Such insight into the workings of the tribunals is rare and the reader is constantly impressed by meticulous references to case law. Beautifully produced...a welcome addition to the current literature on international law.' Ingrid Detter, International affairs`...[this] book is devoted to a comprehensive analysis of the application of the substantive law of the ad hoc tribunals...an excellent tool in solidifying the judicial achievements so far...the reach and detail of the analysis...is admirable, and the clear expression of the author's views and the painstaking footnoting of judgments and decisions make a solid piece of writing...an essential reference work for both practitioners and anyone else with an interest in understanding the subject of international criminal law.' Bing Bing Jia, International Criminal Law Review Guénaël Mettraux is Associate Legal Officerof the Appeals Chamber, ICTY.