is twilight just one book or are there a few books?

Well, yes and no.
Twilight is the first book in a series of four, it goes:
Twilight
New Moon
Eclipse
Breaking Dawn

So, Twilight is only one book but there are sequels to it.
Hope that helps!!

Twilight is a series of book named "Twilight Series"

First Book:Twilight
Second Book:New Moon
Third Book:Eclipse
Fourth Book;Breaking Dawn(splitted in three parts)

First book is Twilight,twice is New Moon,third is Eclipse and the last is Breaking Dawn. Those are the books,but exist the movie with the same names. Have fun! Hope that help u!

well there is a twilight series so i'm pretty sure there more than 1 book.so yes there r a frew books.