DENVER, Colo. /ScoopCloud/ -- Herbert Hoover's fall from grace during his presidency (1928-1932) has been well documented, but his initial rise to greatness -- when he became known to the world as a Great Humanitarian -- has all but been forgotten, according to "Yanks behind the Lines" (ISBN 978-1538141649; Rowman & Littlefield) author Jeffrey B. Miller, who is the first historian in more than thirty years to focus his three award-winning nonfiction books on Hoover's WWI efforts in German-occupied Belgium.