This book is an important contribution to the discourse on how contemporary international law can react to the challenge of Non-State Actors participating in armed conflicts. Lubell is the first author to bring together the area of international law that regulates the resort to force in the territory of other States, IHL and IHRL with respect to the extraterritorial forcible measures against Non-State Actors in one book. As such, the book serves both as a primer for those who want to familiarize themselves with the system of international law concerning armed conflicts, and -- more particularly -- as an attempt to apply the international law system to Non-State Actors...it is a worthwhile read for students and scholars studying the use of force in international law, and practitioners working in this area.