Meet Me at Midnight — Francine Pascal

Elizabeth Wakefield hates Nicole Banes. And from the moment she arrived at Camp Echo Mountain, Nicole has hated Elizabeth too. It doesn't help that Elizabeth is dating Joey Mason, the guy Nicole loves. Now Nicole wants revenge--and a surprise visit from Elizabeth's boyfriend Todd Wilkins gives Nicole the perfect opportunity to ruin Elizabeth's life!
As usual, Jessica Wakefield has fallen for the one guy she can't have: Paul Mathis, a gorgeous local. Camp rules forbid sneaking off the grounds. Will Jessica's plans for a moonlit meeting end in disaster...or true love?