Catholic Catechism (Deharbe, German original)
This book is in de.
Fr Joseph Deharbe's Katholischer Katechismus in the German edition revised for the United States (1870, with the approbations of the American bishops): prayers, introduction, faith (the articles of the Creed), commandments (of God and of the Church, sin and virtue) and the means of grace (grace, the sacraments, prayer) in numbered questions and answers. The German original of the Deharbe catechism; the English translations are separate books.