"Trevor has started his first job at Ashton's Fresh Marketplace, where someone is tampering with the food to terrify customers. Trevor and his friends Nick and Robyn decide to find the person who's out to destroy the store's reputation. Is it Mattie, the disgruntled ex-employee? Or is it Alex, their schoolmate who doesn't know when a joke has gone too far? As the pranks get more dangerous, the list of suspects grows. Trevor, Robyn and Nick are determined to find the culprit before someone gets hurt"--P. [4] of cover.