Semi-Immortals Or Immortals And / Or Demideities Or Deities?

My memory of this dream is very flawed and the dream itself was confusing, and so expect missing details and for things to not make much sense.

All that I can remember of this dream from last night is that I was in what seemed to be a fictional version of The BP Library where I work as a shelver, and I remember being in the back in the employee areas.