Oprah Winfrey to Discontinue Book Club Feature on Talk Show Fri Apr 5,12:55 PM ET By: Jeffrey A. Trachtenberg, Staff Reporter of The Wall Street Journal NEW YORK -- In a significant blow to the book-publishing business, talk-show hostess Oprah Winfrey is ending Oprah's Book Club, a monthly feature that provided a huge boost in sales to the authors lucky enough to be featured on the show. "It has become harder and harder to find books on a monthly basis that I feel absolutely compelled to share," Ms. Winfrey said in a statement. "I will continue featuring books on the...