As co-chair of the systematics committee of the American Malacological Society (Ken Hayes is the other co-chair), I'd like to take this moment to share a link on a new book, which has just been released entitled "Freshwater Mollusks of the World - A Distribution Atlas" edited by myself and Kevin S. Cummings and including contributing authors from around the world. For more information about the book and list of contributing authors, please go to:
https://jhupbooks.press.jhu.edu/title/freshwater-mollusks-world
Although the publisher states it won't be shipped until April, it is now being shipped.