One of the best-kept publishing secrets is the existence of a small tome, Die ernsthafte Christenpflicht. It has gone through 87 known editions or reprints since the first known edition in 1708. This stands as the Amish and Mennonite book in North America with the most (64) editions or reprints.
Now for the first time, all the prayers of the current edition of Christenpflicht have been translated by Leonard Gross and are available in English--including the seven prayers appended in the 1992 edition from the first (1846) Canadian edition.
The Introduction, Preface, Table of Contents and sample prayers are available at the Historical Committee of the Mennonite Church's web page.