The vanishing point - Val McDermid

Stephanie Harker is travelling through the security gates at O'Hare airport, on her way to an idyllic holiday. Five-year-old Jimmy goes through the metal detector first. But then, stuck on the other side of security, she watches in panic and disbelief as a uniformed agent leads her boy away. The authorities, unaware of Jimmy's existence, become alerted by Stephanie's erratic behaviour. She finds herself brutally wrestled to the ground and restrained before she can finally inform them what has happened - and Jimmy is long gone... However, as Stephanie tells her story to the FBI, it's evident that this apparently normal family is not what it seems. What is Jimmy's background? Why would someone abduct him? And, with time running out, how can Stephanie get him back?