ALL of my books will be set in 3 different time periods of the same universe. These periods are called generations:
Generation I:
Set in the years following WWIII Earth is recovering after being turned into a barren wasteland and is being terraformed and renamed Vanet.
Generation II:
A dystopian future where cities are vast fortresses towering above the landscape. This is the time of the Light Wars.
Generation III:
in the far future, multiple species take to the stars, discover each other and form great alliances creating a spectacular web of commerce and war among the stars.
