Trojan Horse in the City of God, by Dietrich von Hildebrand

Dietrich von Hildebrand explains the philosophical errors behind the misinterpretation of the documents of Vatican II and how they led to changes in the liturgy/ other religious practices of Catholics--and not for the better. I'm a Catholic who was born long after the council, so I have no firsthand experience of the preconciliar church; however I'm also a classical music and vintage movie aficionado who learned something about what it was like by listening to sacred music by various composers and watching old film footage. I definitely learned a lot reading this book. Dr. von Hildebrand must have been a great professor. He writes clearly and concisely such that even I, with no philosophical training, could follow his arguments.