Contemporary security governance often relies on markets and networks to link public agencies to non-governmental actors. This book explores the rise, nature, and future of these new forms of security governance across various domestic, transnational, and international settings. The chapters reveal similarities and differences in the way security governance operates in various policy settings. The contributors argue that the similarities generally arise because policy elites, at various levels of governance, have come to believe that security depends on building resilience and communities through various joined-up arrangements, networks, and partnerships. Differences nonetheless persist because civil servants, street level bureaucrats, voluntary sector actors, and citizens all draw on diverse traditions to interpret, and at times resist, the joined-up security being promoted by these policy elites. This book therefore decentres security governance, showing how all kinds of local traditions influence the way it works in different settings. It pays particular attention to the meanings, cultures, and ideologies by which policy actors encounter, interpret, and evaluate security dilemmas. This book was originally published as a special issue in Global Crime.