What is the author's style in Shattered Mirror by Amelia Atwater-Rhodes?

The story is divided into thirty-one chapters. Each of the chapters is identified by title only which means the reader has no clue about the action to be revealed during any chapter. The story flows in chronological order though there are pieces of historical information provided through conversations or memories. For example, Nissa is talking to Sarah about how she and her brothers became vampires.