Here's an update about ordering the book. I've gotten a lot of emails about the following problem.
Some of you might be thinking...
hmmm, who is this guy? Why should I buy a copy of his book?
That's a reasonable thing to ponder. It's good to be a smart shopper. So what do you do? Here's a typical next step...
Oh, there's a sample of the book on the official website. Perhaps I should get that first.
You read the sample and then you check out the ordering page. It seems legit! You're convinced to buy the book. Great! So where's the problem? The problem is there was some confusion between the sample copy and the full version of the book. They both had the same cover. People would buy the book, but then wonder where it was on their computer. Even after clicking the download link from FastSpring, the full version of the book would not open as expected.
To help prevent this problem from happening in the future, I updated the sample (located at Photics.com) to include a red bar across the top of the cover.
Now it's a lot easier to tell the difference between the two copies. Once you have the full version, the sample version shouldn't be necessary. In iBooks, simply "right-click" or "control + click" the sample book to select the "Delete" option. (On iOS, use the "Select" and then "Delete" option to remove the sample copy.)