The legend of the hejnał, a trumpet call cut short as its player was shot by invaders in the 13th century, is now a Kraków tradition. There’s no known written record of it, though, prior to The Trumpeter of Krakow, an adventure story by American journalist and teacher Eric P. Kelly that won the Newbery in 1929. It’s unclear if it’s a story Kelly heard in Poland, misheard, or made up, but his book is still read and appreciated, and joins the US public domain in 16 days. #PublicDomainDayCountdown