At the Mountains of Madness, vol.2

Return to the final days of the Dyer expedition in the remote Antarctic wastes. The letters from expedition leader Professor William Dyer grow increasingly more desperate as the expedition presses on, leaving sanity behind them. What they discover beneath the ice is meant for no living man to see, Cyclopean structures and alien landscapes that defy history itself. The final act of the Dyer Expedition is a descent into cosmic horror and utter madness.

See volume 1 here.