Mark P. Shea is a popular Catholic writer and speaker. In addition to being co-author of the smash bestseller A Guide to the Passion: 100 Questions About The Passion of the Christ, he is also the author of The Da Vinci Deception: 100 Questions About the Fact and Fiction of The Da Vinci Code (Ascension), Making Senses Out of Scripture: Reading the Bible as the First Christians Did (Basilica), By What Authority?: An Evangelical Discovers Catholic Tradition (Our Sunday Visitor) and This is My Body: An Evangelical Discovers the Real Presence (Christendom Press). An award-winning columnist, he contributes numerous articles to many magazines. Mark also appears frequently on radio and TV and is a regular guest each Tuesday on "Heart, Mind, and Strength" radio with Dr. Gregory Popcak. In addition, Mark is a nationally known speaker.  Finally, Mark is Senior Content Editor for www.CatholicExchange.com and co-authors, with Dr. Scott Hahn, the Catholic Scripture Study available at that site. He lives in Washington state with his wife, Janet, and their four sons.