In other words, the book is not out in stores right now - but will be in 12 days, as of Wednesday, August 31. Those not wishing to wait that long can order it online from Viper (and probably other retailers as well, though Amazon still hasn't got the book in stock) as of this weekend! (A quick check reveals that the book hasn't been listed at Viper's Book Store just yet, but the weekend is still young...)
And yes, the Viper Comics Book Store does ship overseas. I asked about that, too;).