BookBrunch - The bestseller formula - solved?

This algorithm is based on several planks. First, the authors argue that having a clear main topic is important, and moreover that the topic of "human closeness" is always important. But you also need something else. Their model selected (blind) Danielle Steel and John Grisham as the two authors most likely to sell the most: both qualify on the human closeness criterion, but both always have another strong anchor too - in Grisham's case, the law. Modern settings are better than historical or fantastical, but place is less important than might be supposed. Surprisingly, Archer and Jockers say that sex does not sell; having made this claim, they have to go to great lengths to explain the success of Fifty Shades of Grey.