To some hockey players, the number on their sweater is especially significant. It is as essential to the spirit of the player as is his childhood, his upbringing or the skill that got him to the NHL. The Little Book of Hockey Sweaters offers the inside story from professional hockey players, both past and present, on the numbers they selected to wear on their backs. From Wayne Gretzky to Mario Lemieux to Eddie Shack, the jersey number represents a...