Raven Hill Mysteries #4: Cry of the Cat

As they work at their new afternoon job at the local cat shop, Purrfection, Elmo and the rest of the Teen Power gang learn of more and more cats disappearing. Curious and worried, they decide they have to try and solve the mystery. Elmo knows that he has to find the cats before it's too late. Where are the cats going? Who is taking them? And why?