This edited volume focuses on contemporary terrorism challenges that remain serious in the Indo-Pacific region long after the seminal terrorist attacks on 11 September 2001. Since then, the emergence of the new terrorism has been epitomised by rise of radical Islamist terrorist groups such as Al Qaeda and the Islamic State. Through the use of new terrorism techniques and strategies, such movements have been able to transform themselves into worldwide, global jihadist movements. While both Al Qaeda and the Islamic State have suffered greatly from vigorous and sustained global counter-terrorism operations led by the United States, their local affiliates in the Indo-Pacific, as well as other local radical Islamist and non-Islamist groups, have continued to pose serious terrorist challenges in the Indo-Pacific region. While the threat has somewhat abated in recent times in Southeast Asia, the terrorist threat remains very serious in South Asia. The chapters in this book assess the key threats and counter-terrorism responses of South and Southeast Asia to these on-going challenges. This book will be indispensable to students, scholars and policy makers working on Asian Security, Politics, International Relations and the security dynamics of the Indo-Pacific region. The chapters in this issue were originally published as a special issue of Journal of Policing, Intelligence and Counter Terrorism.