The Return To Rome

In Spirit and Truth: Worship as God Requires (Understanding and Applying the Regulative Principle of Worship) by James R. Hughes:

"Within a generation after the Puritans, the Protestant Church began drifting back toward the worship practices of the Roman Catholic Church of the late Middle Ages. Today, that return is almost complete. We once again see Protestants following liturgies and ecclesiastical calendars that are similar, if not identical to, those followed by the Roman Catholic Church. In many respects, there is no essential difference."

A very informative online book.