Marathon, Revised and Updated 5th EditionBy: Hal Higdon Now completely updated and revised a new edition of the long running marathon training guide that has helped more than half a million people reach their goals. Marathon: The Ultimate Training Guide is among the bestselling running books of all time for many reasons, but above all others is this one: It works. Marathon running has changed in the seven years since the fourth edition there are more runners than ever before, the popularity