Why do golfers yell foreo? Is it ever acceptable for a player to use a purple golf ball? Am I entitled to a free drop if dog poop interferes with my swing? Since 1999, readers of Golf Digest have submitted their most puzzling and perplexing golf questions to the Golf Guru, a.k.a. Editor-in-Chief John Barton, whose monthly column answers these imponderables with authority and good humor. This illustrated golfer’s miscellany compiles more than 250 of his most compelling QandAs, tackling everything from history and physics to fashion, etiquette, and beyond. Why do golf courses have 18 holes? Why do golf balls have dimples? If Tiger Woods wears white socks with black shoes, why can’t I? Whatever the question, The Golf Guru has the answer!