AY's+Proposal

__ Proposal __ I would like to study spies. I enjoy reading books about them, and I'm really interested in how they do what they do. I have a book called Spyology that has all sorts of information about spies. I know they're job is about gathering information, and is usually dangerous. Codes and ciphers are part of the job too. Spying is supposed to be a secret, but everyone knows about it. So, how did people find out about spies? I'd also like to know why they're needed.