NEW YORK (Reuters) - Although Dolly Parton has cemented her place in country and popular music, pop culture, and as an entrepreneur and philanthropist, she still, on occasion, gets nervous. Her new book, "Dream More: Celebrate the Dreamer in You" encourages readers to overcome their fears, believe in their passions and keep taking risks. The "I Will Always Love You" singer/songwriter, 66, who has written more than 3,000 songs and sold more than 100 million records, talked to Reuters about the message of the book, which was published this week. Q. You say you put off writing this book? A. ...