Margery Post Abbott is a "Released Friend" who writes about Quakerism and travels in the ministry with the support of her Monthly Meeting. Mary Ellen Chijioke is University Librarian at Godfrey Okoye University, Enugu, Nigeria. She previously served as Curator of the Friends Historical Library of Swarthmore College and the Director of Hege Library, Guilford College. Pink Dandelion is professor of Quaker Studies at the University of Birmingham where he directs the work of the Centre for Postgraduate Quaker Studies, Woodbrooke and the University of Birmingham. John William Oliver Jr. is professor emeritus of the history department at Malone University in Ohio. He was clerk/convener of the Quaker Historians and Archivists biennial conferences and served on the executive committee of the Ohio Academy of History.

The expanded second edition of the Historical Dictionary of the Friends (Quakers) relates the history of the Friends through a chronology, an introductory essay, an extensive bibliography, and over 700 cross-referenced dictionary entries on concepts, significant figures, places, activities, and periods. This book is an excellent access point for scholars and students, who will find the overviews and sources for further research provided by this book to be enormously helpful.