Well I don't know how old you are but my daughter is now reading book 4 and has seen all the films that have been made to date and absolutely loves the whole package!
My daughter read the 4 books in the saga and convinced me to read them too.
I must say I enjoyed them all.
The films were ok, but I felt the books were better, maybe because my imagination can run riot sometimes..
Breaking dawn is out in paperback in a months time (the hardback came out end of last year ), if you get Twilight New Moon and Eclipse now you''ll have caught up. Read the books though first before seeing the films.
** a novella called "The short second life of Bree Tanner" fits in between Eclipse and Breaking Dawn
read the books first!!!
Just the first 3 are films so far but they have cut so much out of the books. It seems that Breaking Dawn will be made into 2 films so that the story can fit in much better