Sefer Bnei Ya'akov [Itur].

Commentary on Sefer HaItur with responses, by Rabbi Yaakov Sasson (Shushan), brought to print by Rabbi Hayim Kimhi ben Rabbi Yitzhak.

Sefer HaItur is a halakha (Jewish religious law) book written by Isaac ben Abba Mari (c.1122 – c.1193), who is often simply referred to as 'Ba'al HaItur'. A prominent Rabbi from Marseilles, France, his opus magnum, Itur Soferim (aka Sefer HaItur), discusses Jewish conjugal laws, monetary laws, Jewish holidays, and some of the laws governing the kashrut (Jewish dietary law). He largely based his own work on the judicial decisions passed down by the Babylonian 'Geonic' authority.

This work also includes Responsa, as well as some corrections and notes on the Tur and Maimonides.