In part, the Guardian says, "Last year, you had to peer hard to discern the much-vaunted "Richard and Judy effect" on sales in a league table with JK Rowling at number one and a top 10 also including four elderly Dan Brown thrillers, the adult edition of the Harry Potter and a Sudoku book. This time, their impact is unmistakable. Kate Mosse at number one and Victoria Hislop at number two were both R&J selections, as were Dorothy Koomson (nine), the Guardian's own Sam Bourne (13), Elizabeth Kostova (14) and Elisabeth Hyde (39)."
Without looking on Amazon, the only author I recognize is Elizabeth Kostova, who wrote The Historian. Read more from the Guardian here.. Read about Richard and Judy here..