Here it is for your reading pleasure! It's still not showing up on a few places, but here is what I have so far.
Amazon UK: http://www.amazon.co.uk/dp/B00FJ39Y2S
iTunes US: https://itunes.apple.com/us/book/monsters-among-us/id715429609?mt=11
iTunes UK: https://itunes.apple.com/gb/book/monsters-among-us/id715429609?mt=11
Happy reading. Hope it gets you in the mood for Halloween!