Well, first of all, assuming you mean the full four book series and not just the first book titled Twilight I will answer your question.
I am sure the quick answer one might spout is Romeo and Juliet, however, it's actually a play, not a book. Thus the only other book repeatedly referenced in the Twilight Series is Wuthering Heights.
Eclipse is the next book of the most famous series Twilight.
Yes, but most probably midnight sun (Edward's point of view on the story) might also be considered as a part of the Twilight Series.
I believe that the most popular book out of the Twilight saga by: Stephanie Meyer is either the first book of the trilogy: Twilight or the final book in the Twilight saga: Breaking Dawn, but that is just my opinion to other people I may be wrong.
Twilight because of the movie came out
twilight or beastly
Twilight and Breaking Dawn are the two most popular books from the twilight saga series, but they shouldn't be.
the ending is the most actiony part in twilight - book and movie
no but most
Breaking Dawn.
The most inappropriate Twilight book would be Breaking Dawn. Can't say why or anything because it might spoil it, but it's very mature.
Dracula, no doubt. But the most modern, famous story of vampires would of course be Twilight! :)
The twilight movie uses most diolouge from the book and is basicly the same except for some small differences.