Crisis on Citadel II — Alex Raymond

Stranded in deep space, Colonel Flash Gordon and his companions, Dale Arden and Dr. Hans Zarkov discover themselves in the middle of a centuries-old battle for supremacy over the universe.  Manipulated by a war-crazed android and unsure of who is friend and who is foe, they must struggle to find a way to stop the bloodshed before all life...including that on their home planet, Earth...is annihilated.