Primary sources of Egyptian mythology: Pyramid Texts, Book of the Dead, Herodotus, Plutarch

Where Egyptian mythology is actually written down — the Pyramid Texts, the Book of the Dead and the temple legends as Budge printed them, Herodotus's second book, and Plutarch's On Isis and Osiris — with what each carries, how this corpus cites it, and an honest note on why Budge is used here and what a modern reader should reach for instead.