Should I read the books?

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

yes

I would say yes, as I believe Du 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 Bücher but at least you'll be able to crush the 'If Du haven't read the Bücher your opinion doesn't matter!' arguement.
Personally, I find the Filme 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 Du watch the last film, as it's my favourite and the best rated of the series.

If Du 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 Filme are better, but its your decision if Du want to go for it!