The Runaway Jury by John Grisham
When justice is for sale, every jury has a price. In Biloxi, Mississippi, a landmark trial against a tobacco company begins. There are hundreds of millions of dollars at stake and soon it swerves mysteriously off course. The jury is behaving strangely, and at least one juror is convinced he's being watched. Soon they have to be sequestered. Then a tip from an anonymous young woman suggests she is able to predict the jurors' increasingly odd behaviour. Someone has a plan. But who? And, more importantly, what do they want?