Two separate novel series encompass Humankind's reverse colonization of the galaxy. The Dianis, A World in Turmoil chronicles cover the period from when the IDB is withdrawn from Dianis to after the war with the Empire of Nak Drakas. The chronicles of the Owan Conspiracy carry on after the conflict and follow the story arc to the far reaches of the galaxy, notably to the planet of Et Arin-4.