I bought my copy from the store I work at that sells educational toys. Iron, if you buy it on our website I'm sure they could ship it to you if you live in North America, and if now, I'm sure we could work something out between us.
Alternatively, Chapters/Coles should carry it (I can't remember if there are American branches)
Anyway, my store is
www.mastermindtoys.com if you want it.
I started reading it this week and I've only breached the first couple chapters, but it seems like a really cool book so far.