>A quick heads up, I just noticed there was a time-limited free upgrade
>coupon on my pragprog account for this book, worth checking your account>if you've got the 1.9 pickaxe book :)

 Update: they response me: this opportunity can be reached by the people who bought the book(Programming Ruby 1.9(third edition)) from their webpage, not if you bought on Amazon or somewhere else. Kind regards. Damin.