When i was growing up I used to love the book series twilight 
yes is an interesting one,The series is told primarily from Bella's point of view,  
yes, it was about a love triangle between a human, a werewolf and a vampire, all in high school
yes with the series Twilight", "New Moon", "Eclipse" and "Breaking Dawn", as well as "The Twilight Saga" film 
those books from 2005-2015 have sold over 120 million copies and have been make into 4 movies
the characters is:  Isabella Marie "Bella" 
yes, in the movie bella is cast by kristen stewart and edward is robert pattinson, an interesting thing is the author wrote the book based on a dream
his also established him among the highest paid and most bankable actors in Hollywood.
he got a lot of oscar buzz for his recent movie good time which actually didn't get him the nomination but showed his versatility 
He was named one of "TIME" magazine's 100 most influential people in the world, in 2010