/lit/ - Literature

For my current writing project, i am trying to do some reading (both fiction and nonfiction/philosopht) on the nature of dreams. I know it's a hefty issue that people have written about for centuries, but still. Do you know any good reading material for that?
I am trying to somehow depict and think on what a dream is, where it comes from and where it leads to, the power of dream magic, the inner world and such things.
Theway I am writing my fantasy is that individual dreams are nothing more than impressions of the wider dream world in which all minds canlfow together, not just a singular,separate thing.