Dr. Seuss's infectious rhymes, fanciful creatures, and roundabout plots not only changed the way children read but imagined the world. And to Think That I Saw It On Mulberry Street, Green Eggs and Ham, The Cat and the Hat, these and other classics have sold hundreds of millions of copies and entertained children and adults for decades. After graduating from Dartmouth, Theodor Geisel used his talents as an ad-man, political provocateur, and...