Helps to self-examination and prayers on different subjects, for the use of humble-minded and inquiring Jews / ትንሽ መጽሐፍ ልብን ለመመርመር ከጸሉት ጋራ. Transl. by J.M. Flad. 3rd, revised edition. St. Chrischona: Mission Press, 1875. [Printed at the request and expense of the London Society for Promoting Christianity among the Jews]
German Source
Goßner, Johannes. Der Weg zur Seligkeit, in Frag und Antwort nach Anleitung der heiligen Schrift. Nebst Worten der Ermahnung an alle Heilige und Sünder [The Way to Salvation, in Questions and Answers According to the Instructions of the Holy Scripture. Along with Words of Admonition to All Saints and Sinners]. Böblingen: G.F. Landbeck, 1827. [Google Books]