by Edmund J Mazza, medieval historian
https://www.amazon.com/Saints-Antipopes-Church-Convicted-Evicted/dp/B0GP7CGFVH?_encoding=UTF8&sr=8-3&language=en_US&ref_=as_li_ss_tl
Saints vs Antipopes reveals crucial truths for Catholics in the face of the Francis/Leo reigns of t/error:
The actions of saints like St. Bernard and St. Norbert who publicly denounced, plotted to overthrow—and even dispatched armies against—a canonically elected "pope," who ruled from Rome for almost eight years...unprecedented "sedition" against a sitting "pontiff."
The teaching of saints like Robert Bellarmine and other reputed theologians on how Christ's prayer protects the Church and Popes from ever teaching heresy: "the Pope not only should not, but cannot preach heresy, but rather should always preach the truth. He will certainly do that, since the Lord commanded him to confirm his brethren, and for that reason added: 'I have prayed for thee, that thy faith shall not fail,' (Lk 22:32)"
The shocking secrets that Mary, Queen of All Saints, revealed to saints and holy people at LaSalette, Fatima, and Akita: "The Church will be eclipsed/one will not know which is the true pope." "An apostasy will begin at the top of the Church." "There will be a man who is in the Vatican, dressed in white, looking something like a pope but talking like the devil. He is supposedly the head of Christianity, but is, in fact, spewing the doctrine of an antipope."
Medieval historian and author, Edmund J. Mazza is interviewed on the John Henry Weston show. I find this topic very interesting, particularly at this chaotic and concerning time in Church history:
https://www.lifesitenews.com/blogs/how-did-saints-respond-to-antipopes-medieval-historian-weighs-in/