Jim Cymbala has served as pastor of the Brooklyn Tabernacle for more than forty years. He is the author of many bestselling books, including Fresh Wind, Fresh Fire, The Church God Blesses, When God s People Pray, Fresh Faith, and Spirit Rising. He lives in New York City with his wife, Carol, who directs the Grammy Award winning Brooklyn Tabernacle Choir. The Cymbalas have three children and eight grandchildren.

Dean Merrill, quien fuera ejecutivo de publicaciones de Enfoque en la Familia y de la Sociedad Biblica Internacional, es autor o coautor de 31 libros, entre ellos The God Who Won't Let Go y Sinners in the Hands of an Angry Church. Fue Presidente de la Asociacion de Casas Editoras Cristianas Evangelicas y miembro de la junta de Global Publishers Alliance, la division internacional de publicacion para la Asociacion. Tambien ha sido editor de revistas, entre ellas Campus Life, Leadership Journal y Christian Herald. Vive con su esposa en Colorado Springs, Colorado.