This report explores why libraries are well positioned to be allies in increasing family engagement. The strategies shared come from a review of the literature, a survey of library directors, and a learning community of librarians. The paper concludes with a call for action and a framework libraries can use to work with schools, community organizations, and service providers in establishing better systems of family engagement that support the learning and success of children and families. A companion book, "Ideabook: Libraries for Families," offers a framework, examples, and practical strategies to guide libraries in their work to engage families.