I’ve updated the book with an addendum about Watch OS 2, and I have updated the how-to section at the back of the book to provide accurate information for the new version. I’ve also added tips on topics such as editing complications and protecting yourself if your watch is lost or stolen. Everyone who previously bought the book should receive a download link for a free copy of the update within the next few hours, if you don’t have it already. If you haven’t bought it yet, it still costs US$10, and you can buy it here. Enjoy!