Grisham does do great courtroom, though. I think that, after QBVII, A Time to Kill is one of my favorite courtroom dramas. Although some may say that QBVII cannot be dismissed as merely a courtroom drama, Leon Uris wrote about the trial superbly.

And so that this doesn't wander into a Books We Just Read thread, QBVII was also one of the best miniseries ever made.