LOS ANGELES (Reuters) - A new book on Whitney Houston by her early producer seeks to tell the story of the rise to stardom of the pop diva who died nine months ago. Emmy and Grammy-winning producer Narada Michael Walden, who produced many of Houston's early hits, like "How Will I Know" and "I Wanna Dance With Somebody," appeared at the Grammy Museum in Los Angeles on Wednesday to discuss the book and perform some of the songs he collaborated on. "Her death was so shocking and sudden that I wanted to create something to keep alive the beautiful aspects of her life. ...