We found a huge pile of mail after returning home, and now I'm going through all the letters, invoices and other mail we received in the last few weeks. One of the letters I received contained the book sales for 11Q4. For some reason, people are still buying the first edition. In the world of IT books, you have a bestseller as soon as you can sell 5,000 copies. And yes: the second book is now at 5,394 copies. That makes it official: I've written a second bestseller!