0, 1, 9, and 37.
But there are other numbers that are also fantastic, for completely different reasons. I just got a sales report from Headline, my UK publisher, and the first month of sales for I Am Not a Serial Killer was really awesome–a lot better than I thought it was. Sales were split more or less 50/50 between UK sales and foreign exports (weighted slightly toward the UK), so many thanks to all of my readers from all over the place. Keep reading, and keep sharing the tapes!