'What good is your wealth if you don't get along?' The much loved 'once upon a time' entry makes Sigal's retelling of the fable a particular joy: 'Once upon a time, there were two cousin mice, Both family and friends, which is just as nice. A gray country mouse, cheery and kind. The best sort of mouse you can find. But his cousin mouse, plump and witty, Lived richly in the big house in the city.' And so the story introduces children to...