HARM. A mecha SF story about future warfare is free from 2012 Sept 16 to Sept 20.

HARM. A hard SF story about future warfare between giant mechs to save the Earth from invaders.  Free from Sept 16, 2012 to Sept 20, 2012  to celebrate the release of Raid on Kahamba, the next story in the Exocrisis Blue universe.

Amazon USA / Canada   http://www.amazon.com/dp/B007X65FYA
Amazon UK   http://www.amazon.co.uk/HARM-ebook/dp/B007X65FYA

"A GOOD READ.  Stand alone short set in a world where humanity is being invaded by aliens with superior weaponry. Reverse engineering enables mankind to create new tech... HARM."