What do you get when you have a former law schooler running her own agency? A whole lot of best-sellers. Jill Singer profiles Theresa Park and her agency, who represents authors like #1 New York Times best-selling author Nicholas Sparks (The Notebook, A Walk to Remember) and best-selling novelist Laura Zigman (Animal Husbandry, Dating Big Bird). Park takes equal amounts of fiction and nonfiction, but if it's the latter, you better have something commercial on your hands. This is one agency, by the way, where you send your pitch via good old snail mail.