Hades. The Diaspora‪.‬

Hades. The Diaspora is the third part of the Hadesian cycle. The book is a space opera that tells the story of Pavel Tsenre, a high school graduate who gets sent to the planet of Hades as part of his school training program.
The strongest player in the system is the Uroboros concern, which eliminates its competition by not necessarily honest means, announces separation and aims to establish its own separate Kingdom. At the same time the unions, using the concern’s ongoing preparations as a cover, amass their own forces. A revolution breaks out. Part of the Fleet remains faithful to Earth. To make matters worse, during the fratricidal fighting, the system is visited by Aliens….