By What Authority? - An Evangelical Discovers Catholic Tradition

Mark P. Shea is a popular Catholic writer and speaker. He describes himself as a double-jump convert: raised more or less as an agnostic pagan, became a non-denominational Evangelical in 1979, and entered the Catholic Church in 1987. Mark is the author of several books including:

"Making Senses Out of Scripture: Reading the Bible as the First Christians Did", "By What Authority?: An Evangelical Discovers Catholic Tradition", "This is My Body: An Evangelical Discovers the Real Presence" and "Mary, Mother of the Son" an acclaimed three volume set from Catholic Answers.

He also finds time to be Senior Content Editor at Catholic Exchange, a non-profit web portal for Catholics. In addition, Mark is an affiliate and devoted friend of the Catherine of Siena Institute and boosts their phenomenally important work wherever and whenever he can. Further, he is an awarding-winning columnist, contributing "Heaven and Earth" to the late lamented New Covenant and "The Culture of Life" to Catholic Parent, as well as numerous articles to many other magazines. He has been happily married since 1983 and he and his wife have frequent adventures with their four sons.

"The thing I like most about this book is the crystal clear and compelling case that Shea makes - on the basis of logic, history, and Scripture - for Sacred ("big T") Tradition. It is simply the best that I have found."
- Scott Hahn, Associate Professor of Theology - Franciscan University of Steubeneille

"This is not just another book of Catholic apologetics. It's not only a good think; it's also a good read. Concrete. clear, compelling arguments."
-Peter Kreeft, Professor of Philosophy - Boston College

"An important service to Catholics, Evangelicals, and all those seeking a firm grounding for Faith, Shea argues powerfully for the extra-biblical authority of Sacred Tradition as a depository and source of Revelation side by side with the Bible, to which itt testifies and which it interprets with authority."
-Russell Shaw, Director of Public Information for the Knights of Columbus.