"Dr. Seuss is an American icon. Whimsical and wonderful, his work defined our childhoods and those of our children. His silly rhymes are a bottomless well of magic; his illustrations timeless favorites that make us laugh. The Grinch, the Cat in the Hat, and Horton, are in his troupe of beloved creations. Yet Theodor Geisel had another, more radical side, where the allure and fascination of his Seussian alter ego begins. Geisel was a complicated...