The "U'velechtecha Vaderech" edition. The third volume of Rabbi Schneur Zalman's Shulchan Aruch is now a very handy travel companion. The text has been re-set for optimal size, and not merely reduced from the original.
Rabbi Schneur Zalman of Liadi, founder of the Chabad-Lubavitch Movement, established a unique method by which to sell one`s chometz before Pesach, and published it in his Siddur. Seder Mechiras Chometz presents the text of Rabbi Schneur Zalman`s method, with copious commentary and annotations by Rabbi Sholom DovBer Levine.