I don't remember "Quenta Silmarillion" (part 3) well enough to really follow this rendition of that segment; it's been something like 15 years since I read it. But the rest is fun. Even if you're completely unfamiliar with the Silmarillion, you may enjoy the first section ("Ainulindale"); it's basically Tolkien's version of the fall of Lucifer, only in this context it's reduced to about 20 brief lines of dialogue. And the last section, "Of the Rings of Power and the Third Age," should mostly make sense to anyone who's read or seen LotR, being basically a very brief and high-level summary of said work.
Example from "Akallabeth":
MEN OF MIDDLE-EARTH: Shiny tall wonderful wise sea-king dudes! Yay!
NUMENOREANS: Here, have some stuff and wisdom.