It is 1944 and weeks before D-Day. The Allies are disguising their invasion plans with a phoney armada of ships and planes. Their plan would be ruined if an enemy agent found out... and then The Needle does just that. Hunted by MI5, he leads a murderous trail across Britain to a waiting U-Boat. But he hasn't planned for a storm-battered island, and the remarkable young woman who lives there . . ."
Special Agent Kathryn Dance, the kinesics expert with the California Bureau of Investigation, is on the case. The girl points her to an online community where accusations against a boy at her school turn vicious; it seems the bullying went too far, and he has snapped.
More crosses appear for future victims, linked to a names of users on a website where classmates have been busy attacking the boy; Kathryn Dance has to race against the clock using all her knowledge of kinesics and human behaviour to find the attacker before he can carry out any more attacks. This is a book closely linked to the internet and Deaver throughout has links to actual web pages (which I confess I did not read) - an interesting idea, though for me the best part of this work was the suspense and the characters - a fab book, had me guessing (wrongly!) until the very end.