Krzyżanowski was the editor of the largest and most reputable collection of Polish proverbs up to date, called the "bible of Polish proverbs", Nowa księga przysłów i wyrażeń przysłowiowych polskich (New Book of Polish Proverbs and Proverbial Expressions, also known as Nowa Księga przysłów polskich, A New Book of Polish Proverbs, published in several volumes in the years 1969–1978). Despite the proliferation of similar works, in 2012 his work was still described as "the most comprehensive" work of its type in Poland.
