'On transnational issues as diverse as carbon emissions, flu outbreaks, food security, and human rights, networks of skilled professionals coordinate actions and responses across a welter of competing organizations. This widely distributed, lateral form of influence has been largely unexplored until now. Seabrooke and Henriksen assemble a notable cast of contributors to examine how a new regime of governance is orchestrated through professional networks. This impressive volume provides novel insights into how experts shape global issues and create demand for their expertise.' Walter W. Powell, Stanford University, California