A Maiden’s Grave by Jeffery Deaver

A trio of desperate convicts has hijacked a bus carrying a group of deaf and mute schoolgirls who are now being held hostage in a disused slaughterhouse. FBI agent Arthur Potter is flown in to negotiate with the men, as are local police, state troopers, politicians and the media. Not everyone has the same agenda. And the killers will kill one innocent child an hour, on the hour, until their demands are met.