Bill Cosby, Dolly Parton and Ray Romano's careers with be the subject of a new book written by veteran Hollywood agent SAM HASKELL. But Haskell - who retired from the William Morris Agency three years ago at age 49 - says his former clients need not worry about a juicy tell-all memoir, insisting his aim is to "share my journey and adventures and how I went through what they call the shark-filled waters" of the entertainment industry. He says, "I have a lot to say and a lot of examples that will be used, but it's not the kind of thing someone would have to be afraid of." The book, written with David Rensin and published by Ballantine Books, will be released within the next two years.