The Tilted World by Tom Franklin and Beth Ann Fennelly William Morrow/Harper Collins, $25.99, 303 pages, ISBN 978-0-06-206918-4 Think you know American History?  Here’s a question for you . . . what, and when, was the most destructive flood in the entire history of the United States? It’s a tough question.  The correct answer is, the Mississippi River in the year 1927.  It’s known as the year the rains,