The rebellion of doomed. The trilogy "Point of Status". Kalugin A.

The war is always scary. The civil war is doubly terrible. Well, if your opponent also becomes an outrageous reality that can accept any guise and transform the consciousness of people, forcing them to betray friends and kill loved ones, there is almost no chance of victory. Andrei Makeev, an agent of galactic status, had every reason to complete his deadly mission on the doomed planet Dest, but again and again he decides to stay. Because only the outcome of the last battle can depend on him and the platoon of army intelligence.