 Krohn is well known as the author of a series of ""Maggid"" books inspired by the stories of Rabbi Sholom Schwadron, who was known as the "Maggid of Jerusalem" for the inspirational mussar talks he gave every Friday night from 1952 to 1992 to the public at the Zikhron Moshe shtiebel in Jerusalem.Krohn met Schwadron when his father invited Schwadron to stay with them during one of his frequent fund-raising trips to America in late 1964, although Schwadron didn't know him or his family personally.Schwadron insisted on paying rent, which Krohn agreed to reluctantly.