You can pick up The Sovereign Hand from these New Zealand booksellers:
Unity Books: In stock, or able to order.
Paperplus: In stock, or able to order.
Whitcoulls: Ask – may not have in their order system yet.
And definitely please ask and support your local independent bookseller.

Online you can order direct from Steam Press, with free postage, or from Fishpond.

For Ebooks, links to Amazon, Kobo etc, are on the Steam Press page. 

International print and ebooks can be purchased from Amazon.