Aunt Jane's Nieces Out West is a juvenile novel for girls, written by L. Frank Baum. It is the ninth book in the ten-volume Aunt Jane's Nieces series, and carries forward the continuing story of the cousins Louise Merrick, Patsy Doyle, and Elizabeth De Graf. Like all the books in the series, it was published under Baum's "Edith Van Dyne" pseudonym. The story of the ninth novel opens soon after the conclusion of the plot of the previous book. Uncle John, Patsy and Beth are still in southern California, where they have come to visit Louise, her husband Arthur Weldon, and their new baby.