Looking for resource material for a dream world [closed]

I have started working on a world that is set in a dream realm. I am using it to create one-off gaming sessions that I can do in a single day and pull in any characters that are currently being used. It will have an overriding storyline and ties into the world that the DM has created but is not dependent on it.

I am looking for any materials that are set in a dream world. So far my list is starting with the Sandman graphic novels. Does anyone have any other suggestions.