Given that agatha christie wrote 66 novels and 14 short story collections, all of which are still in print in multiple formats and dozens of languages, sceptics would be well advised to admit defeat on the issue of whether or not she sold more books than any other novelist ever has. a. admit defeat on the issue of whether or not she sold more books than any other novelist ever hasb. be defeated on the issue of whether she sold more books than every other novelistc. admit defeat on the issue of whether she sold more books than any other novelist ever hasd. admit defeat on the issue of whether or not she sold more books than any other noveliste. be defeated on the issue of whether she sold more books than every other novelist