How can library professionals gain support for their ideas, develop collaborative relationships, and become recognized leaders—regardless of position or title? Library organizations are full of people with talent, insight, energy, and ambition who don’t necessarily possess the formal power to make and implement decisions. Even those in management roles often find that their authority comes with limitations. Working effectively in the library profession means finding ways to reach and lead people who are not required to listen or follow. The second ACRL Active Guide, Influencing without Authority by Melanie Hawks is designed to help individuals develop the skills they need to influence peers, library administrators, college and university faculty, students, and external stakeholders.