Brepols Publishers in Belgium is publishing the complete works of Mother Philippine Duchesne. I've copied the information from the email I received from Brepols below. If anyone is interested in ordering a copy - or, considering the price, having a library order a copy - let me know so I can send you the PDF file with the order form and additional details.
Philippine Duchesne, pionnière à la frontière américaine Œuvres complètes (1769-1852) - Edited by Marie-France Carreel RSCJ and Carolyn Osiek RSCJ
2 vols, 1695 pages, 24 col. ills., 152 x 229 mm - 2017, Hardback, ISBN 978-2-503-57045-7, 200 euro / c. US$230 - Text in French – Publication date: 15 December 2017 - Introductory price until 31 December 2017 : 175 euro / c. US$202 (excl. VAT and shipping costs)
In 1818, Mother Rose Philippine Duchesne, of the newly-founded Society of the Sacred Heart of Jesus, left France to participate in the missionary expansion of the Catholic Church in the New World. The writings of Saint Philippine—656 letters, five journals and a few shorter documents, all in French (except for one letter in English)—constitute a rich source of information about her missionary call and the sacrifices involved, the primitive life of the first years on the Missouri frontier, and the development of the Catholic Church and the Society of the Sacred Heart in North America during thirty-four years. All of her writings have not been available to readers and researchers until now. This annotated edition brings them all together.