Leo Kenis, STD, PhD (1990) KU Leuven, is Emeritus Professor of church history at that University. He has published on the contemporary history of Catholicism, including, as editor with Marc Lindeijer, The Survival of the Jesuits in the Low Countries, 1773-1850 (Leuven University Press, 2019).

Penelope R. Hall, M.Div., Ph.D., D.D., has worked internationally in the field of theological education for over 40 years, teaching, writing, editing texts for in-house publications, and editing for such publishers as T. & T. Clark, Orbis and the United Bible Societies.

Marek Rostkowski is a Catholic priest with a doctorate in Missiology from the Pontifical Gregorian University, Rome (2007). He was Head Librarian of Pontifical Missionary Library and Library of Pontifical Urbaniana University in Vatican City (2000-2016), Editor-in-Chief of Bibliographia Missionaria, and Vice-President of BETH from 2012 to 2016.