Superspy middle schoolers Ben and Erica must embark on a mission to rescue Erica's grandfather, who was abducted from a remote Alaskan training facility.

Sixteen-year-old Kitty Granger has always known that others consider her peculiar. She hates noise and crowds, tends to fixate on patterns, and often feels acutely aware of her surroundings even as she struggles to interpret the behavior of people around her. As a working-class girl in London's East End, she's spent her whole life learning to hide these traits. Until the day when she notices the mysterious man on the bus and finds herself following...