The runaway jury - John Grisham

Every jury has a leader, and the verdict belongs
to him. In Biloxi, Mississippi, a landmark tobacco
trial with hundreds of millions of dollars at
stake beginsroutinely, then swerves mysteriously off
course. The jury is behaving strangely, and at
least one juroris convinced he's being watched. Soon
they have to be sequestered. Then a tip from an
anonymousyoung woman suggests she is able to predict
the jurors' increasingly odd behavior. Is the jury
somehow being manipulated, or even controlled? If
so, by whom? And, more important,why?