The Keep Sphere includes the planets Keep, Agra, Spectra, Mangol, Tyrol and more. This science fiction adventure/romance series boasts space battles, futuristic technology (military and artificial sentience), carefully-drawn societies, interaction with a native sentient race, and romance.
The first three books in the series define Agra and its society through three siblings. Athena WARme, a warrior, has been a pilot during the four-year Agra-Keep war. Apollo’s story begins after the war is over, and he is rebuilding his life after losing his commission as an Agran warrior. Athena’s older brother, Aries, is a planetary negotiator who usually mediates difficult disputes between planets.