Twilight series (Twilight, New Moon, Eclipse, Breaking Dawn) by Stephenie Meyer

Twilight (Twilight #1)
In the first book of the Twlilight Saga, internationally bestselling author Stephenie Meyer introduces Bella Swan and Edward Cullen, a pair of star-crossed lovers whose forbidden relationship ripens against the backdrop of small-town suspicion and a mysterious coven of vampires. This is a love story with bite.

New Moon (Twilight #2)
The dramatic sequel to Twilight, following the tale of a teenage girl whose love for a vampire gets her into trouble.

Eclipse (Twilight #3)
As Seattle is ravaged by a string of mysterious killings and a malicious vampire continues her quest for revenge, Bella once again finds herself surrounded by danger. In the midst of it all, she is forced to choose between her love for Edward and her friendship with Jacob - knowing that her decision has the potential to ignite the ageless struggle between vampire and werewolf. With her graduation quickly approaching, Bella has one more decision to make: life or death. But which is which?

Breaking Dawn (Twilight #4)
To be irrevocably in love with a vampire is both fantasy and nightmare woven into a dangerously heightened reality for Bella Swan. Pulled in one direction by her intense passion for Edward Cullen, and in another by her profound connection to werewolf Jacob Black, she has endured a tumultuous year of temptation, loss, and strife to reach the ultimate turning point. Her imminent choice to either join the dark but seductive world of immortals or to pursue a fully human life has become the thread from which the fates of two tribes hangs.

Now that Bella has made her decision, a startling chain of unprecedented events is about to unfold with potentially devastating and unfathomable, consequences. Just when the frayed strands of Bella's life - first discovered in Twilight, then scattered and torn in New Moon and Eclipse - seem ready to heal and knit together, could they be destroyed... forever?