The Sedevacantist Delusion concerns the new face of Roman Catholicism introduced with Vatican II (1962-1965) and its most antagonistic enemy since the Protestant Reformers: the Sedevacantists. The Sedevacantists believe that the Church under Pope Francis is a substantially different organism than the Roman Catholic Church. Maintaining that today's Church has been a counterfeit sect since the commencement of the reforms called for at Vatican II, they believe they are engaged in a battle of epic proportions for the one true Church of Jesus Christ. In provocative style, lifelong Catholic and former Sedevacantist John C. Pontrello wrote this book with the objective of proving that Sedevacantism violates fundamental doctrines of the Church and is therefore heretical. But in making his case, he does not shy away from the truth Sedevacantism brings to light about the Catholic Church: Pope Francis is the real pope but only because the Church can fail and defect in contradiction of its own terms yet still remain the Catholic Church of the ages. With its critical examinations of the doctrines of indefectibility, visibility, apostolicity, and the papacy, it will be difficult, if not impossible, for the Catholic faithful to look at the Church in the same way after reading this probing book.