A detailed study of the Easter Sunday Attack, the most catastrophic attack by the Islamic State in 2019. Based on interviews with the key terrorist and family members of the perpetrators as well as the policy and decisionmakers, the research examines the global expansion of Islamic State after its territorial defeat in Iraq and Syria. The study argues that 63 per cent of the world’s Muslim population live in Asia and they need to be protected from a new wave of radicalisation. The research concludes with a blueprint to Asian countries to work together to fight the current and emerging wave of Muslim radicalisation and reciprocal radicalisation.