silmarillion is about from the very beggining until well....the MAIN part the end of the first age...but it also tells of numenor falling...and the third age (briefly)
but well......iluvatar made the ainur sing..and they sang and he made there song a reaity...creating earth

some of the ainur went down and some stayed...the ones that stayed are unimportant in the story
these ainur were VALAR and MAIAR the valar being the major ainur....and of them melkor was the mightiest...he desired (and envyes iluvata) to be called lord...so he fought the other vakar for kingship of earth- or arda...he was winning until tulkas came along and ruined it...so he ran back to M:E and there he stayed being evil..with his lietenant (yours truly) sauron, then he was a bit more evil when the elves appeared and the valar came and saved the day and imprisoned him in valinor....but he was like 'im sorry for being evil for countless ages of the world...' so they were 'ok you were vil for thousands of milleniums but we will let you out after just three ages for being nice' and he got out and stole the silmarils which were created by feanor.....feanor was like 'thieving git' and said ' i will get them back..!!!' so he set off but manwes herald said 'you cannot go' so feanor says to him 'heuy..eat my elvish strawberry scented shit vala boy' and set off....but then got killed because he was an idiot and tried to fight several balrogs, which you dont do,,,, so then all feanors sons were like AHHH DADDY and they waent to war aswell....and theres lotsd of wars, important people dont live for more than three pages, then theres beren who falls in love with luthien and he says to thingol luthiens dad ' can i marry your daughter ' and thingol was like 'yeah if you come here with a silmaril in your hand' (because evryone wanted a silmaril...just like everyone wanted a buzz lightyear or a woody a few year ago...) so he set off about to die, but then luthien went along...and beren tried to get away so she wouldnt die with him....but she kept cathcing him, and then they met huan ho was a dog, but could talk...only three times though, and then luthien sang everyone in angband (melkors then fortress) to sleep with a lullaby

aw how sweet then melkor tried to get off with her but she made him sleep, and then beren took a silmaril, and tried to take another but the dagger conviniently snapped and scrathched morgoths poor face...so then he woke up and sent his BIG DADDY WOLF after them...and it bit of berens hand with the silmaril in it and beren said to thingol 'haha i hav a silmaril in my hand....but my hand is in some big wolfs body' so thingol got a hunting party and huan killed the wolf..but died doig it, and beren died too i think, but he came back because luthien was a good singer.....and thingol had the silmaril and he made some dwarves make a necklace with it, but they killed him and took it...then the dwarves got killed,,,,,,,then hurin got cursed by morgoth and all his children were cursed too...and turin jkilled his friend and was unlucky and married his sister who he hadnt seen since she was little so he didnt know, and she didnt either because she was hypntized by a dragon......but she killed herself and so did turin (he killed the dragin too) and then everyone basically died and then the valar FINALLY came and fought morgoth and cast him into the void.....
then sauron went to numenor and was sly and it got destroyed and then he made some rings eith the elves of eregion or somewhere like that...and the rest you know as lotr
i ruined the entire story didnt i?
no theres LOADS of other interwined stories that kickass