The Twilight Saga is a series of 4 books written by Stephenie Meyer.

The movie version of Twilight has just been released in the US, and is due for release in Australia on December 12th

Twilight

About three things I was absolutely positive:
First, Edward was a vampire.
Second, there was a part of him - and I didn’t know how dominant that part might be - that thirsted for my blood.
And third, I was unconditionally and irrevocably in love with him.

When Isabella Swan moves to the gloomy town of Forks and meets the mysterious, alluring Edward Cullen, her life takes a thrilling and terrifying turn. With his porcelain skin, golden eyes, mesmerizing voice, and supernatural gifts, Edward is both irresistible and impenetrable. Up until now, he has managed to keep his true identity hidden, but Bella is determined to uncover his dark secret.
What Bella doesn’t realize is the closer she gets to him, the more she is putting herself and those around her at risk. And, it might be too late to turn back. . . .
Deeply seductive and extraordinarily suspenseful, Twilight is an irresistably compelling love story that will stay with you long after you have turned the final page.

New Moon

'Shoot,' I muttered when the paper sliced my finger; I pulled it out to examine the damage. A single drop of blood oozed from the tiny cut.
It all happened very quickly then.
'No!' Edward roared... Dazed and disoriented, I looked up from the bright red blood pulsing out of my arm - into the fevered eyes of the six suddenly ravenous vampires.

For Bella Swan, there is one thing more important than life itself: Edward Cullen. But being in love with a vampire is more dangerous than Bella ever could have imagined. Edward has already rescued Bella from the clutches of an evil vampire, but now, as their daring relationship threatens all that is near and dear to them, they realize their troubles may just be beginning....

Legions of readers entranced by the New York Times bestseller Twilight are hungry for more, and they won't be disappointed by this gripping sequel. In New Moon, Stephenie Meyer delivers another irresistible combination of romance and suspense with a supernatural twist. Passionate, riveting, and deeply moving, this vampire love saga is well on its way to literary immortality.

Eclipse

'Bella ?'
Edward's soft voice came from behind me. I turned to see him spring lightly up the porch steps, his hair windblown from running. He pulled me into his arms at once, and kissed me again. His kiss frightened me. There was too much tension, too strong an edge to the way his lips crushed mine - like he was afraid we had only so much time left to us.

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?

Following the international bestsellers Twilight and New Moon, Eclipse is the much anticipated third book in Stephenie Meyer's captivating saga of vampire romance.

Breaking Dawn

When you loved the one who was killing you, it left you no options. How could you run, how could you fight, when doing so would have hurt that beloved one? If your life was all you had to give, how could you not give it? If it was someone you truly loved?

In the much anticipated fourth book in Stephenie Meyer's vampire love story, questions will be answered and the fate of Bella and Edward will be revealed.