Pay particular attention to that big green slice of the pie.
Look at it carefully.
Now look at your favourite writer.
Now look back at the graph.
The biggest gift-giving season of the year is about to descend on us. Consider giving a book. And if you can't then SERIOUSLY consider giving that other intangible thing, as encapsulated by that green slice. GIve word-of-mouth. Give buzz. Give a book you like some wings.