Menuhat Ahava Hilchot Shabbat by Rabbi Moshe Levi z”l it’s a 4 Vol. set whichs give all of the Divrei Poskim of the Rishonim and Acharonim that applies in our days. Each vol. covers an important area of Shabbat which Be’Ezrat Hashem by studying these seforim will bring loving peacefulness to our lifes in Olam Ha’zeh and Olam Ha’ba.