Blades in the Dark is out now! As of yet, the paperback edition with all three parts and a preview of The Winds of Change is available here: https://www.createspace.com/4281182. It will become available on Amazon's standard sites within a few days.
Also, part one has been published as an e-book. Get it here: http://smarturl.it/theguardiansofsiva. It will be free starting October 29 and until November 2, 2013.