SGA-18 Allegiance    by Melissa Scott
Price: $4.99 USD. 107660 words. Published by Crossroad Press  on November 30, 2011. .
Enemies and friends Reeling from the shocking discovery of Rodney McKay’s fate, Colonel Sheppard and his team retreat to Atlantis to regroup. With Rodney not only in the hands of the Wraith, but apparently working for them, Atlantis faces a new danger — their own man, turned against them.