At the Mountains of Madness - Lovecraft, H. P.

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'To that flash of semi-vision can be traced a full half of the horror which has ever since haunted us'

An expedition to Antarctica goes horribly wrong as a group of explorers stumbles upon some mysterious ancient ruins, with devastating consequences. At the Mountains of Madness ranks among Lovecraft's most terrifying novellas, and is a firm favourite among fans of classic horror.

(https://www.penguin.co.uk/books/308255/at-the-mountains-of-madness/9780241341315.html)