This is classic Y.A. fiction revolving around privileged teen-age girls. Petty rivalries and jealousies, pressure to excel (from parents), to fit in (from peers). Plus the added angst of having a secret that could destroy their lives and someone who knows the secret and threatens to tell. The four girls have no idea who knows and who they can trust, they don’t even trust each other.
The ‘story’ comes to a conclusion in this 4th book. It is not the end of the Rosewood Day School girls. Pretty Little Liars continues, but we know who “A” is and we know who killed Alison. These books have a very real feel to them. Even if the world they live in is vastly different from any I lived in, the attitudes and emotions given to them are very ‘teenage girl believable’.