I enjoyed it but there was one thing that I thought was strange. The Blessed Mother appears in an extra head of a mutated lady who had two heads. I thought that was strange. But otherwise I enjoyed the book. I liked the first part of the three parts that takes place earlier the most.
I think you misunderstood.
It wasn't the Blessed Mother herself, but she had something in common with her: no Original Sin.
God created her in a state of original innocence, with all the original gifts to boot. That's why she rejected the priest's attempt at baptism, but could discern the Real Presence.
I also liked the first and second parts the most. But I love the way the book takes place over such a large amount of time -- and how they keep referring back to things that happened in the first 2 parts. They mention the main character in the first part (Venerable Francis Gerard of Utah), the wood carving with the strange smile, etc.
And then you have that weird Jew character, who seems to be alive in all 3 parts of the book, even though we're talking about 1800 years!