
Extreme cases of loyalty and antagonism are personified in characters such as Noelle Lange and Ivy Slade-to degrees that are sometimes questioned or denounced by the narrator. Thematically, moral ambiguity is a prominent feature of Brian's work.

As the series progresses, several matters surrounding mystery, morality, and romance arise. The books chronicle the rise of ambitious teenager Reed Brennan, the series' narrator, as she becomes a member of her new school's elite dorm-composed of a glamorous yet disparate group of teens known as the Billings Girls. Private is a series of young-adult novels by American author Kate Brian, beginning with 2006's entry of the same name.

The first book (center), the first prequel (left), and the spin-off.
