It might be tough to land on this small, powerful agency's list, but you'll be there for life, writes Aileen Gallagher. Examples of other clients: David McCullough (1776, Truman), Malcolm Gladwell (The Tipping Point, Blink), Bill O'Reilly (The O'Reilly Factor), and Michael Moore (Fahrenheit 9/11). The agency takes about half fiction, half nonfiction and takes on not just your book but television appearances, film rights and more. Send a hard copy one-page letter describing your project. Good luck!