Hehe. I'll bite, since I've read it.
Even for Tolkien enthusiasts, this can be a tough read. Parts of it read much more like a history than an adventure tale.
But yes, it's a highly interesting if you can get through it. Tolkien himself was much more emotionally involved with The Simarillion than even the Lord of the Rings trilogy. He spent longer writing the parts of Sim., edited and revised it numerous times, and didn't even have it published during his lifetime because he was never fully happy with it (Tolkien was a voracious editor of his own work). It was only posthumously that his son Christopher put together the various parts and had them published.
The names "Beren and Luthien" are inscribed on Tolkien's and his wife's tombstones, respectively....a telling sign of how close the tale was to his heart.
And yeah, Morgoth (Melkor), is Sauron's original master, and a "god" in Tolkien's mythology. If you think of, say, Odin or Zeus turning evil, you have an idea of what Morgoth was.