THE RUSH TO WRITE 'SON OF IACOCCA'
FOUR years ago on this date, The New York Times hardcover best-seller list did not include a single biography, autobiography or memoir. Now ''Iacocca'' is enjoying its 80th week on that list. ''Yeager,'' by former test-pilot Chuck Yeager, is in its 44th week of best-selling glory. ''The Triumph of Politics,'' David A. Stockman's memoir of his years in the Reagan Administration, is the No. 1 best seller. And a seemingly endless stream of businessmen, politicians and performers are eagerly telling their innermost personal and professional secrets in print. Apparently, they are writing what the public wants to read. Today, 10 out of the 16 non-fiction best sellers are life stories or memoirs. The most recent Gallup annual report on book buying showed that the sale of autobiography and biography now runs a close second to that of reference and instruction books, the publishing industry's meat and potatoes. In what borders on understatement, Peter Osnos, a senior editor at Random House, says, ''The success record of books by celebrities who have something to say, and who say it well, seems to be very good.''