The Department Store, Its Past and Its Future - Merchant Princes: An Intimate History of Jewish Families Who Built Great Department Stores. By Leon Harris. New York, Harper and Row, 1979. Pp. xx + 411. $12.95. - The Grand Emporiums: The Illustrated History of America's Great Department Stores. By Robert Hendrickson. New York, Stein and Day, 1979. Pp. viii + 488. $14.95. - Sears, Roebuck, U.S.A.: The Great American Catalog Store and How it Grew. By Gordon L. Weil. New York, Stein and Day, 1977. Pp. xiv. + 277. $10.95. - Shopping in Style: London from the Restoration to Edwardian Elegance. By Alison Adburgham. London, Thames and Hudson, 1979. Pp. 192. $14.95.