There is no such thing as a new idea. It is impossible. We simply take a lot of old ideas and put them into a sort of mental kaleidoscope. We give them a turn and they make new and curious combinations. We keep on turning and making new combinations indefinitely; but they are the same old pieces of coloured glass that have been in use through all the ages.
A 2007 study by Sorensen investigated the impact of appearing in the NY Times bestseller list. He tracked the success of books that should have been included on the basis of their actual sales, but — because of time lags an accidental omissions — weren’t, and compared them to this that did make it on to the list. He found a dramatic effect: just being on the list led to an increase in sales of 13-14 per cent on average, and a 57 per cent increase in sales for first-time authors.