Doctor Who: Tales of Trenzalore. The Eleventh Doctor's Last Stand

As it had been foretold, the armies of the Universe gathered at Trenzalore. Only one thing stood between the planet and destruction - the Doctor. For nine hundred years, he defended the planet, and the tiny town of Christmas, against the forces that would destroy it. He never knew how long he could keep the peace. He never knew what creatures would emerge from the snowy night to threaten him next.
He knew only that at the end he would die on Trenzalore. Some of what happened during those terrible years is well documented. But most of it remains shrouded in mystery and darkness. Until now. This is a glimpse of just some of the terrors the people faced, the monstrous threats the Doctor defeated. These are the tales of the monsters who found themselves afraid - and of the one man who was not. (Tales of Trenzalore documents four of the Doctor's adventures from different periods during the Siege of Trenzalore and the ensuing battle: Let it Snow - by Justin RichardsAn Apple a Day - by George MannStrangers in the Outland - by Paul FinchThe Dreaming - by Mark Morris)