Clone camp!

"Kaitlyn and Noah are arch-enemies at their summer camp, and with good reason. They are rivals in everything, and both are determined to come out on top. But when they suddenly start to see double and it turns out that their camp counselors have doppelgangers running amok, they have to work together to get to the bottom of the strangely replicating counselors and save their camp from the Scaremaster--who seems to be pulling the strings from inside the pages of his creepy book"--Amazon.