YES, you can get it on Nook or Apple.
NO, it is not available outside the US and Canada. In fact, the Kindle version is not currently available internationally. This is my bad, and I’m going to try to fix it, but I just have not had time.
AND - a reader points out - this is a great chance to try the Audible version, since you can add the Audible to the ebook and get both for much less than the price of the Audible alone.
Okay, I will try not to mention it again for a while (though if it gets to #1 you’re going to hear).