WAYNE A. MACK is Professor of Biblical Counseling at The Master's College in Santa Clarita, California. He has earned degrees from Wheaton College, Philadelphia Seminary, and Westminster Theological Seminary.

DAVE SWAVELY is a published author of four nonfiction books including "Decisions, Decisions "and" Who Are You to Judge?" He lived in the beautiful Napa Valley for ten years and now resides in lovely Chester County, near Philadelphia. "Silhouette" was his first novel, and the sequel, "Kaleidocide", was also published by Thomas Dunne Books.

John MacArthur, es el pastor-maestro de la Grace Community Church en Sun Valley, California. Ademas, es presidente de The Master's College and Seminary. Es un prolifico autor con muchos exitos de ventas. Su estilo popular de exposicion y ensenanza de la Biblia puede escucharse a diario en su programa radial de difusion internacional "Gracia a vosotros."

John MacArthur is pastor-teacher of Grace Community Church in Sun Valley, California, as well as author, conference speaker, president of The Master's College and featured teacher with Grace to You, an international radio broadcast. His more than six dozen books have sold millions of copies worldwide and include more than two dozen volumes of The MacArthur New Testament Commentary series.