Should I read the books?

Well if 你 liked the movies,then I say yes 你 should read the books.For the most part the 电影院 follow the books.The people making the Twilight 电影院 knew it was important to the Twilight fanbase be true to the books.

yes

I would say yes, as I believe 你 should never turn down the chance to read, whatever type of book it may be. I don't know if you'll necessarily like the 图书 but at least you'll be able to crush the 'If 你 haven't read the 图书 your opinion doesn't matter!' arguement.
Personally, I find the 电影院 to be better than the books, because there is much less insight into Bella's thoughts (obviously, as it's a movie) which I find to be annoying at the best of times and downright bitchy at the worst of times.
I'd also recommend 你 watch the last film, as it's my favourite and the best rated of the series.

If 你 get sick easily I wouldn't. I have a pretty strong stomach, but when I read Renesmees birth I almost threw up. I'm pretty sure the 电影院 are better, but its your decision if 你 want to go for it!