ALEXANDER HISLOP’S TWO BABYLONS Papal worship Revealed to be the worship of Nimrod

I first heard about this book in a study of Revelation by Jon Courson. The discussion was about Mystery Babylon, the great whore.
I think it gives important insight into how the Catholic church appropriated the mystery religions...and how even today, the church (protestant) has taken into herself some of these pagan practices.
Originally a pamphlet published in 1853, The Two Babylons is Hislop's most famous work. In this book he argues that the Roman Catholic Church is nothing more than a pagan cult, with roots in Babylonian mystery cults, which have a bank of secret knowledge only available to those who have been formally accepted into the cult.
Roman Catholics, Hislop argues, are descendants from early Christians who adopted the Roman religion descended from the worship of Semiramis, the wife of the founder of Babylon. By discrediting the true Christianity of the Catholics, Hislop hoped to bolster the legitimacy of the Protestant and Scottish Reformations.
Students of theology and those interested in the complex history of Christianity will find Hislop's arguments provocative enough that they may be moved to further research of their own. (Back Cover)
Here is the link: The Two Babylons, and William Cooper does a little rant (below) on the subject and the book.