[lone-commenter]

We may agree that piracy is theft, but 'ALittleLight has a point.

From Novembrer 2011 — when it was published — to September 2012 — when the author believes it's been "pirated" — there is a window of just 10 months. Not 21 months. 10 months.

Now, did sales beging to drop only after September? Were them already going down? How long before? How do sales typically go over time for books? For Amazon books? Other possible causes?

Moreover, I think your analogy is completely off. Here is a better one.

You can't find your credit card anymore. You are notified of suspect online payments by your bank. Thinking about it, you're quite sure you left it at the supermarket; and you somehow conclude that that sneaky cashier must have stolen it.

But it turns out, your son got a trojan while trying to pirate a PlayStation game on your family PC with the magnificent Windows XP, and your card number was saved in Google Chrome.