In Subtle Webs, Jose Eos Trinidad reveals how organizations outside schools have created an invisible infrastructure not only to affect local school districts but also to shape US education. He illustrates this by providing a behind-the-scenes look at how local organizations in Chicago, Philadelphia, and New York City have transformed data and worked with high schools to address the problem of students dropping out. The book argues that changes in a decentralized system happen less through top-down policy mandates or bottom-up social movements, and more through "outside-in" initiatives of networked organizations spread across various local systems. By detailing change across multiple levels and across multiple locations, Trinidad uncovers new ways to think about educational transformation, policy reform, and organizational change.