Alien Lockdown by Vijaya Schartz
The year is 3033 in the Andromeda Galaxy, and deep in the bowels of the underground prison, something has gone terribly wrong. Rhonda Alendresis never wanted this prison job. When the civilians vanish and an earthquake damages the nuclear reactor, she must go down to repair it with Captain Perfect himself, Cole Riggeur, who always plays by the rules and never trusted a woman in his life.
But deep in the underground penitentiary, the most wicked convicts in the Galaxy are loose, and a treacherous shape-shifter plans his revenge. Disconnected from the Garrison, against impossible odds, Cole and Rhonda now face their greatest challenge… trusting each other in order to survive.