"Did you see that?" Riley asked Katy. "They took two cameras, but-" "They only put one back!" Katy finished.
Katy and her new friend Riley are on a summer holiday for teenagers, but there's something strange about the camp. What are the other campers doing on the shopping trips? And how can Katy and Riley stop them?

Cambridge Discovery Readers is an exciting new series of original fiction, adapted fiction and factbooks, specifically written for pre-teen and teenage learners of English. Graded into seven levels - from Starter to Advanced - the readers provide easy and enjoyable reading with skills and vocabulary practice on a wide range of contemporary topics and themes.