Book excerpt: Actors at every stage of their careers have a lot of questions, and Ask an Agent gives a lot of answers. Do I need an agent? How do I get one? What will an agent do for me? When is it time to switch agents? Help is on the way! Author Margaret Emory--a talent agent for more than fourteen years--writes Ask an Agent, the most popular column in America's foremost publication for working actors, Back Stage. In clear, straightforward text, she gives the agent's spin on everything from headshots and resumes to auditions, casting directors, and managers. Ask an Agent offers real help for the real world of acting.