My copy arrived today, so YES, the book is available and the source is legit. (not that there were any doubts.)A minor point for anyone outside of Oz who might be ordering - be sure to give the vendor the precise format for addressing your package. They left my house number off of the parcel, and my street is probably about 15 miles long... fortunately the PO knows me from my pictures which are posted so prominently there. 
That is all. Carry on!
That is all. Carry on!