Aunt Jane's Nieces at Millville

Aunt Jane's Nieces at Millville is a young-adult novel by L. Frank Baum, written under the pen name Edith Van Dyne and the third book in the Aunt Jane's series. The story picks up after the three cousins return from Europe in Aunt Jane's Nieces Abroad. Uncle John and the cousins head north to a farm in upper New York State to escape the city's heat during the approaching summer. There they become involved with the mystery of death and missing fortunes.