Suggest the best novels of the following authors....?

Question: Suggest the best novels of the following authors!.!.!.!.!?

1!. John Grisham
2!. Agatha Christe
3!. Sydney Sheldon
4!. Mario Puzo
5!. Robert Ludlum
6!. Dan BrownWww@QuestionHome@Com

Best Answer - Chosen by Asker:

1!. The Pelican Brief
2!. Murder on the Orient Express
3!. If Tomorrow Comes
4!. Mario Puzo - The Godfather

Haven't read the last two authors in the list!.Www@QuestionHome@Com