Aunt Jane's Nieces at Millville is a juvenile novel for girls, written by L. Frank Baum under his "Edith Van Dyne" pseudonym. It is the third in his series of Aunt Jane's Nieces novels for young girls. This third novel picks up the story of the three Merrick cousins. Patsy Doyle, Beth De Graf, and Louise Merrick, shortly after the end of the previous book, Aunt Jane's Nieces Abroad.