Ten thousand years. One family. One ship. The fifth and final book in The Long Inheritance resolves the Earth thread and reveals the true origin of the causal loop. Who built the Gravitar? How did the loop begin? And what does it mean when the 'alien' builders turn out to be the descendants of the portal survivors themselves? Inheritance closes the loop -- and answers every question the series asked. Inheritance is the fifth and final book in The Long Inheritance. Book 5 of 5.