Laura and Billy Williams are two ordinary American expat kids living with their parents in England. Then, in an instant, everything changes when Billy is handed a mysterious package in a London Underground station . . .   Billy’s tragic death leaves a hole in Laura’s heart, one that soon becomes filled with anger and a burning obsession to find the terrorist responsible for taking her brother’s life. Her search for the truth takes her into dangerous territory, forcing Laura to question everyone she knows and everything she believes.   The bestselling author of ratchets up the tension in this thriller about a girl who will stop at nothing to separate the truth from the lies.