Since June 2020, Shea has maintained the Stumbling Toward Heaven,[2] blog. From April 2002 until May 2020, he wrote the Catholic and Enjoying It!,[3] blog.
Making Senses Out of Scripture: Reading the Bible as the First Christians Did (Basilica Press, 1999) ISBN978-0964261068
Shaken by Scandals: Catholics Speak Out About Priests' Sexual Abuse (Charis Books, 2002). ISBN156955353X (Contributed "Chapter 9 - Dark Hour: The Long Good Friday of 2002")
A Guide to the Passion: 100 Questions About The Passion of the Christ (Ascension Press, 2004) ISBN978-1932645422
A Guide to Narnia: 100 Questions About The Chronicles of Narnia: The Lion, the Witch, and the Wardrobe (Ascension Press, 2005) ISBN978-1932645972
The Da Vinci Deception: 100 Questions about the Facts and Fiction of The Da Vinci Code (Ascension Press, 2006) ISBN978-1932927641 (co-author with Edward Sri)
Amazing Grace for Survivors (Ascension Press, 2008). Contributed "All is Forgiven, Sadie Hawkins!". ISBN978-1934217474
Catholic Controversies: Understanding Church Teachings and Events in History (Moorings Press, 2010) ISBN978-0982766200 (Contributed "The Mother of the Son: The Case for Marian Devotion" and "Purgatory: Where is That in the Bible?")
Disorientation: The 13 "isms" That Will Send You to Intellectual "La La Land" (Ascension Press, 2010) ISBN978-1934217948 (Contributed "Americanism")
The Church and New Media: Blogging Converts, Online Activists, and Bishops Who Tweet (Our Sunday Visitor, 2011). ISBN978-1592760336 (Contributed "Chapter 4: - Modern Epistles: Blogging the Faith")