Sefer eleh divre ha-berit : ḳovets ha-ḥaramot u-fisḳe ha-halakhot neged rishone ha-Reformim be-Hamburg kolel igrotehem shel gedole ha-dor, ha-Ḥatam Sofer, Aḳiva Eger u-sheʼar ḥakhme Yiśraʼel.