Antedate

Eli Maren left Earth on a mission to save it. He returned three hundred and eighty-seven years later to a world that has no record he ever existed. The Accord is a civilization built on perfect transparency - every citizen findable, every transaction certified, every record preserved by Concord, the vast administrative intelligence that maintains the most comprehensive archive in human history. Nothing is hidden.
Nothing is lost. Eli's mission is beneath the archive. Buried before the founding, sealed by people who understood exactly what they were hiding, and maintained in silence by the system designed to remember everything else. His petitions are received, acknowledged, and returned with flawless courtesy. His provenance is unresolved. His right to refile is unlimited and affirmed. When a geneticist discovers a population erased from the biological record and a historian finds fourteen months of silence with excellent paperwork, the three of them begin assembling the evidence of a cover-up that predates the world they live in - and a threat that the world has eighty-five years to answer. But the system that holds the silence also holds the proof.
And it has been waiting for someone to ask. Antedate is a novel about what happens when a civilization's greatest institution is also its longest lie - and the people who force the record open.