[Editor's note: When we received the latest book by Dava Sobel, author of the multiple-award-winning Longitude, we were intrigued to see that, halfway through her discussions of the life of Copernicus, Sobel inserts a one-act play. We asked her to write a new play for HuffPost Books readers - this time, featuring the two sides of her writing personality, battling over the best way to tell Copernicus' story. This is what she wrote.]
