Help!

[girlyswot]

I'm entering a competition and there's one question I find myself completely stumped on. Does anyone have any idea what book this might be referring to? I can't even work out a way of googling it!

You are researching the occult in the British Library. You accept a file of papers passed to you by a fellow student who says he thinks it should be yours. Inside the file is a slip of paper with strange characters on it. What should you do next?

Thank you!