Islamophobia examines the online and offline experiences of hate crime against Muslims, and the impact upon victims, their families and wider communities. Based on the first national hate crime study to examine the nature, extent and determinants of Muslim victims of hate crime in the virtual and physical worlds, it highlights the multidimensional relationship between online and offline anti-Muslim attacks, especially in a global context. It includes the voices of victims themselves which leads to a more nuanced understanding of anti-Muslim hate crime and prevention of future anti-Muslim hate crime as well as strategies for future prevention.