This class is about Shabtai Bass, whose most famous book, Siftei Chachamim — a collection of commentaries on Rashi’s commentary on Chumash, is well known and used.
He wrote two other books: Siftei Yeshenim — the first bibliography of Jewish books. For this reason Bass is known as the father of Hebrew bibliography.
And: Derech Eretz — a unique, rare, book with advice for Jewish travelers earning a living across Europe. It is part prayer book, part travel guide, and part information for traders.