It was published in 1919 as, then in a 1920 German edition as; the German edition was particularly popular, and went through several editions in the 1920s with sales surpassing 100,000 copies.
It was published in 1919 as, then in a 1920 German edition and a 1922 English edition "My Book of Hours". The German edition was particularly popular; it went through several editions in the 1920s with sales surpassing 100,000 copies.