 It's not just like, here's what the church believes about Mary. It's not just like, here's some stories of Mary's life. It's everything. It's Old Testament symbolism, her life according to the gospels, early church traditions, all the great ecumenical councils, the apparitions, the devotions like the rosary, the bronze scapular, miraculous metal. It talks about cultural things like feast days and popular celebrations. It even talks about companies and cities and geographical landforms dedicated to our blessed mother. It has apologetics about Mary, so it's very comprehensive.