The Poison Apples by Lily Archer

We all know the stories of Cinderella, Snow White, and Rapunzel.  But have you ever heard of Alice Bingley-Beckerman, Reena Paruchuri, or Molly Miller?  Of course you haven’t.  Not yet.  What these girls have in common with their fairy tale sisters is this:  they are the stepdaughters of three very evil stepmothers.  And they’re not happy about it.  They think they are alone in their unhappiness until they arrive at Putnam Mount McKinsey, a posh boarding school located in lovely rural Massachusetts.  Here is where they will plot their revenge.  But first they have to meet.
 
In her first novel, Lily Archer tells a knowing, wickedly funny story about how friendship just may turn out to be more happily-ever-after than family. 
 
- Goodreads Summary