Ephemera = Ephemer (kinda pointless to chop off a letter...whatever)
The worlds conjured by the Book of Prophecies are called "holograms", which likely ties into the datascape in some way (so Maleficent's speculation about Jiminy's journal and the BoP being connected may be going somewhere, they're likely based on the same concept)
Ava's speech in the recent trailer matches with the text dump ("When the time comes, and there is war, you mustn't fight but instead you must fly away from here to the world outside.")
Extracted/obtained somehow by ShardofTruth. Story script, items and other such stuff. Scattered and not in any particular order.
Stuff of note:
Edited by Ultima Spark