Harvest of Time

Summary: From award-winning science-fiction writer Alastair Reynolds, a spellbinding new adventure featuring the Third Doctor.  After billions of years of imprisonment, the vicious Sild have broken out of confinement. From a ruined world at the end of time, they make preparations to conquer the past, with the ultimate goal of rewriting history. But to achieve their aims, they will need to enslave an intellect greater than their own... On Earth, UNIT is called in to investigate a mysterious incident on a North Sea drilling platform. The Doctor believes something is afoot, and no sooner has the investigation begun when something even stranger takes hold: the Brigadier is starting to forget about UNIT's highest-profile prisoner. And he is not alone in his amnesia.  As the Sild invasions begins, the Doctor faces a terrible dilemma. To save the universe, he must save his arch-nemesis...the Master.

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