My somewhat recently published book, PlayStation Mobile Development Cookbook is currently the top ranked game programming book on Amazon…
…in Japan …on Amazon …in Kindle format.
But it’s still pretty cool. 
I check Amazon sales rank every once in a while to see how my book is doing ( it’s the only insight into book sales I have, amazingly enough ) and today when I check Japan, I see:
Number one baby! 
Granted, Amazon track this value in pretty close to real time, so I am the number one selling game programming book in Japan for RIGHT NOW… in an hour I might be 50th… but I’ll take it!
In another bittersweet milestone, I also just found the book on pirate sites for the first time. That actually took longer than I expected to be honest. I suppose an author or game developer should take it as a badge of honour that people will pirate what you created.
Oh, and Japan, you rock!
Totally Off Topic