David Pérez Esparza holds a master's in Conflict Resolution from the University of Essex, UK, a master's in Security Science from the University College London (UCL), UK, and a master's in Public Policy from EGAP, Mexico. With experience as Consultant to the IADB, the UK government, the EU, the UK-RUSI and numerous police agencies, David also holds a PhD in Crime Science from the Faculty of Engineering, UCL, and has co-authored five books on crime and data-driven security.

Carlos A. Pérez Ricart is Assistant Professor in International Relations at the Center for Research and Teaching in Economics (CIDE) in Mexico City. Prior to joining CIDE, he was Postdoctoral Fellow at the University of Oxford, UK, where he worked at both the History Faculty and the Latin American Centre, St. Antony's College. He holds a PhD in Political Science from the Freie Universität Berlin.

Eugenio Weigend Vargas is Associate Director for Gun Violence Prevention at the Center for American Progress. His research has focused on preventing arms trafficking and gun violence in the USA and Mexico. He holds a master's degree from Brown University, USA, and a PhD in Public Policy from Instituto Tecnológico y de Estudios Superiores de Monterrey, Mexico.

Chapter 1: The Global Small Arms Trade and Diversions at Transfer; Michael Picard (GunPolicy.org).- Chapter 2: Gun Violence and Key Challenges in the United States; Eugenio Weigend Vargas (Center for American Progress), Josh Sugarmann (Violence Policy Center), Rukmani Bhatia (Center for American Progress).- Chapter 3: Guns in Latin America: Key Challenges from the Most Violent Region on Earth; Carlos A. Pérez Ricart (St. Antony's College, University of Oxford, CIDE), Jerónimo Castillo (Ideas para la Paz), Alex Curry (Institute of Latin American Studies, London), Mónica Serrano (El Colegio de México).- Chapter 4: Understanding the Flow of Illegal Weapons in Central America: Trends and Controls; Katherine Aguirre Tobón (Igarapé Institute), Ana Yancy Espinoza (Fundación Arias para la Paz y el Progreso Humano), Rebecca Peters (International Action Network on Small Arms (IANSA).- Chapter 4: Guns in the UK and Europe: A Hidden Time-bomb?; Peter Squires (University of Brighton), Helen Poole (University of Northampton), Jo Chilton (West Midlands Police), Sarah Watson (Coventry), Helen Williamson (University of Brighton).- Chapter 5: Africa and the Illicit Arms Trade; Brian Wood (International Peace Information Service), Peter Dannsaert (International Peace Information Service).- Chapter 6: Small Arms Proliferation Challenges and Solutions in South and Southeast Asia; Michael Picard (GunPolicy.org).- Chapter 7: Guns in the Pacific: A Consensus for Disarmament; Maxwell Presser (University of Miami), Philip Alpers (Gun Policy).- Conclusion; Winifred Agnew-Pauley (Anglia Ruskin University), David Pérez Esparza (UCL), Florian J. Hetzel (UCL).