The Anglican Service Book is an edition in traditional language of the Book of Common Prayer of the Episcopal Church in the United States. The book was adapted from the 1979 version as well as other sources such as The Anglican Missal, The Sarum Missal and The Book of Occasional Services. The rubrics of the 1979 book allow for such a work without providing all of the necessary texts. The book is offered to facilitate worship in the traditional language of Anglicanism. The Anglican Service Book is published by The Church of The Good Shepherd in Rosemont, Pennsylvania. The book is principally used by Anglo-Catholics.