A postmodern fairy tale might best describe Jacques Roubaud's delightful book The Princess Hoppy or, The Tale of Labrador. How else to describe a novel that reads like an Arthurian romance as rewritten by Lewis Carroll, with enough math puzzles to keep the game reader busy with a calculator for months? The tale concerns a princess, her faithful dog (who happens to be a wiz at math), four royal uncles always plotting, four royal aunts always potting,...