The curious thought occurred to me, not long ago, that two familiar American series of novels have a surprising amount in common: L. Frank Baum's Oz novels and Edgar Rice Burroughs's Martian novels. Oz and Barsoom are both fantastic realms filled with all sorts of strangenesses, with little concern for consistency, testimony to the authors' delight in sheer invention. Not to mention a subtle streak of satire in both. . . .