Such a Good Liar — Sue Wallman

She's faking her way into the most exclusive social circles for revenge. But how long can her lies hold up?

Seventeen-year-old Lydia Cornwallis has arrived on an exclusive Caribbean island populated only by the ultra-rich and their staff. The Harrington sisters rule the island, throwing lavish parties and treating everyone around them like toys for their amusement, and Lydia simply can't wait to meet them. 

Because she's not Lydia Cornwallis.

And the Harringtons have hell to pay for what they've done.

When a storm hits the island and all routes to the mainland are cut off, Lydia is given the perfect opportunity to exact her murderous revenge. With time running out and her identity about to be exposed, Lydia will need to draw on epic nerve, quicksilver adaptability, and sly cunning to carry out her deadly plans.