Michel Zalman Shurkin

In 2000, Rev Michel Zalman Shurkin, one of the Rav's devoted students, published a book, Harerei Kedem, containing, according to what is stated on the title page, “hiddushim and explanations ... relating to sugyot ... in Seder Mo’ed ... that which he heard and transcribed of the hiddushei Torah of the Ga’on Rabbi Yosef Baer ha-Levi Soloveitchik, zt”l, the Gaon, Av Beit Din of Boston” - that is, the Rav.