What is the author's style in The Field Guide by Holly Black?

The book is from the point of view of an all-knowing observer, while favoring the thoughts and observations of the young boy, Jared. The book is an interesting study in contrasts of points of view of the characters and the observer. The dialogue is largely between the Grace children, Jared, Simon and Mallory, with Mom there as a mediator and adult. The children, thirteen and nine years of age, are about the age of the children who would read the book.