Listen, I am very curious about the links to the modern liturgy back to the early Church. What are the best sources to read about such things. I believe there is some info in the Didache. Any others?
Denis Crouan's The History and Future of the Roman Liturgy is a good historical overview, Fr. Peter Stravinska's The Catholic Church and the Bible shows the Biblical roots in the Liturgy, and Joseph Cardinal Ratzinger's The Spirit of the Liturgy goes in-depth into what the liturgy is and why it's so important that it not be tampered with by anyone. I found all three very helpful.
Here's a brief overview of the seven rites of the Catholic Church: