Holidays on Ice

David Sedaris's beloved holiday collection is new again with six more pieces, including a never before published story. Along with such favorites as the diaries of a Macy's elf and the annals of two very competitive families, are Sedaris's tales of tardy trick-or-treaters ("Us and Them"); the difficulties of explaining the Easter Bunny to the French ("Jesus Shaves"); what to do when you've been locked out in a snowstorm ("Let It Snow"); the puzzling Christmas traditions of other nations ("Six to