
The Book of Common Prayer printed by John Baskerville
When Anglican parishes convert to Catholicism (at least in the USA), they retain their liturgy instead of using the usual liturgy used in most Catholic parishes, as sometimes happens when an entire congregation from another denomination converts.
Our Lady of the Atonement Catholic Church is the first Anglican Use parish, established on August 15, 1983. They now have a blog, in addition to their website.