In Hold Your Friends Close, Sarah Logan provides the first exploration of counter-radicalization policy and homegrown extremism through a theoretical and historical lens. While there are some basic similarities in approach across countries, there are important divergences too. Logan argues that this stems from different ideas about the nature of citizenship and national belonging. Providing the first detailed policy history of counter-radicalization in the US and the UK, as well as a detailed overview of counter-radicalization policies globally, Hold Your Friends Close is an essential read for scholars and policymakers who work on terrorism and its sources.