Stephenie Meyer escreveu:
Jacob's development into a major character was a strange journey. Originally, Jacob was just a device. In Twilight, Bella needed a way to find out the truth about Edward, and the conveniently located Quileute Tribe, with all their fantastic legends, provided a cool option for that revelation. And so Jacob was born—born to tell Bella and Edward's secret.
(...)
Lots of people give me more credit than I deserve; they think I knew Jacob was a werewolf from the very beginning. This is not the case. Twilight was supposed to be a stand alone novel, remember. There was no thought of werewolves in my mind as I wrote it. The Quileute (Quill-yoot) legends Jacob tells Bella in chapter six of Twilight are all genuine Quileute stories that I learned when I was researching the tribe (which is a real tribe with a truly fascinating and mystical history). All actual Quileute legends, except for the vampire myth about the 'cold ones.' I latched onto the wolf story (the actual Quileute legend claims that the tribe descended from wolves transformed by a sorcerer) because it fit with my sketchy knowledge of vampires and werewolves always being at each others' throats (ha ha, pun intended). The dream Bella had of Jacob transforming into a wolf to protect her had no foreshadowing significance at the time. It was just my way of letting Bella's subconscious articulate the situation.


Of course, I of all people should know that dreams can have a serious impact on your life.


Bella's wolf dream was always one of my favorite visual images from Twilight. When I started working on New Moon, that image stuck with me. And I thought to myself, wouldn't it be cool if it was true—if ALL of Jacob's legends were founded in absolute fact? What if Jacob was descended from wolves?

It all started to come together then. Sam on the beach in Twilight was no longer just a believer in old traditions—he was the first contemporary wolf. Billy's warnings were more vital—he had concrete evidence on his hands, rather than just suspicions. And Jacob, my poor, sweet Jacob, had a whole secret heritage just waiting to come crashing down on him.

At that point all the crucial supports of the story were in place, and I only had to write it. Ha. Easier said then done.