Theory: Biblioxes from Deltarune are "bibles" in some way. In TV World, there's a single bibliox you can talk to to get the TV World's Eggman. In The 1st and 3rd sanctuaries, there are multiple biblioxs, because churches usually store heaps of bibles. These are probably books on the Prophecy, because it and the Delta Rune is worshipped amongst people in hometown.
