Firstly, I'm a very long way from getting published at the moment so this is purely academic. However, I've been wondering. If you do get an agent and the agent sells your work to a publisher, what happens when you want to write a sequel, or another unconnected book? Will the agent automatically take you on again or do you have to go through all the submitting thing again as though it's the first time? Also, if you're writing a continuous series (e.g. Harry Potter) will the agent agree at the start to take on all the series (written or unwritten) or just the first book? Thanks in advance for your help!