Stephanie Meyer uses a number of literary devices in her novel Breaking Dawn.
The following quote uses allusion:
What do I look like? The Wizard of Oz? You need a brain? You need a heart? Go ahead, take mine. Take everything I have.
An allusion makes a reference to a famous person, place, event, etc., that the author believes the reader will be familiar with, and is meant to give the reader a better understanding of the text by bringing that well-known person or thing to the reader's attention.
Most people are familiar with movie classic, The Wizard of Oz. In the story, Dorothy has been transported to a magical place. The only way she can return home is to visit a great wizard. She is joined by several characters along the way: a lion, a scarecrow and a man made of tin. All of them have a need with which they hope the Wizard will be able to help. For instance, the scarecrow wants a brain.
This quote means that if I have something you need, take it...whatever it is.
This is also an example of hyperbole. Hyperbole is exaggeration or overstatement used to make a point. It is figurative language and not to be taken literally.
For instance, one might offer to do anything possible to help, however it would not include giving a brain or a heart.
The following is a paradox, which is a contradictory statement of truth that at first seems impossible or untrue.
Fire and ice, somehow existing together without destroying each other.
The contradiction is found in the opposites of fire and ice, and with the impossible perception that the two could ever be in the same place and not destroy each other. In this case, it is a figurate statement, not a literal one. In the physical world, these things cannot coexist. However, when speaking of two people with very different personalities, it is possible that they could coexist.
The next quote is an example of an extended metaphor, which is the comparison between two dissimilar things with similar characteristics as if they were the same. An extended metaphor draws out or extends the comparison beyond the original statement.
My life and his were twisted into a single strand. Cut one, and you cut both.
The two things being compared are lives and a strand—such as a length of string. While the people and the strand are not the same thing, they share similar characteristics. Edward and Bella's lives are woven together like two pieces of string forming a strand. The metaphor continues when Bella notes that cutting one string in the strand would be disastrous for the other as well. When a strand is cut, it comes unraveled, loses its strength, its integrity, and is no longer useful.
Finally, this is an example of a simile, which is the comparison of two dissimilar things sharing similar characteristics as if they were the same, using "like" or "as."
When he moves, even a little bit, you adjust your position at the same time. Like magnets…or gravity. You’re like a…satellite, or something.
Here is a comparison of two people as if they were magnets, gravity and satellites. They are not the same, but they share similar characteristics. They are drawn each other; they move together.