Edited by Xabier Agirre Aranburu, Morten Bergsmo, Simon De Smet and Carsten Stahn, this 1,108-page book offers detailed analyses on how the investigation and preparation of fact-rich cases can be improved, both in national and international jurisdictions. Twenty-four chapters organized in five parts address, inter alia, evidence and analysis, systemic challenges in case-preparation, investigation plans as instruments of quality control, and judicial and prosecutorial participation in investigation and case-preparation. The authors include Antonio Angotti, Devasheesh Bais, Olympia Bekou, Gilbert Bitti, Leïla Bourguiba, Thijs B. Bouwknegt, Ewan Brown, Eleni Chaitidou, Cale Davis, Markus Eikel, Shreeyash Uday Lalit, Moa Lidén, Tor-Geir Myhrer, Trond Myklebust, Matthias Neuner, Christian Axboe Nielsen, Gilad Noam, Gavin Oxburgh, David Re, Alf Butenschøn Skre, Usha Tandon, William Webster and William H. Wiley, in addition to the four co-editors. There are also forewords by Fatou Bensouda and Manoj Kumar Sinha, and a prologue by Gregory S. Gordon. The book follows from a conference at the Indian Law Institute in New Delhi, and is the main outcome of the third leg of a research project of the Centre for International Law Research and Policy (CILRAP) known as the 'Quality Control Project'. Other books produced by the project are Quality Control in Fact-Finding (Second Edition, 2020) and Quality Control in Preliminary Examination: Volumes 1 and 2 (2018). Covering three distinct phases - documentation, preliminary examination and investigation - the volumes consider how the quality of each phase can be improved. Emphasis is placed on the nourishment of an individual mindset and institutional culture of quality control.