The term 'BIG NAME IN BOOK PUBLISHING' can be summarized by two crossword solutions: OPRAH (5 letters) and ATLAS (5 letters). OPRAH is a media mogul, philanthropist, and former talk show host who has become a major force in the publishing industry. She has her own book club, which has helped to launch the careers of many authors. ATLAS is a major publisher of books, magazines, and other media. They have published works from some of the world's most renowned authors, including J.K. Rowling, Stephen King, and John Grisham.