In "Don't Tell the Grown-Ups," one of our wittiest and most astute cultural commentators explores the world of children's literature -- from Lewis Carroll to Dr. Seuss, from classic fairy tales to A.A. Milne, from Beatrix Potter to J.R.R. Tolkien -- and shows that many of the most enduring books for children share a surprising quality: they challenge rather than uphold respectable adult values.