At the Mountains of Madness by H.P. Lovecraft

A tale of terror unlike any other: The barren, windswept interior of the Antarctic plateau was lifeless, or so the expedition from Miskatonic University thought. Then they found strange fossils of unheard-of creatures, carved stones tens of millions of years old and, finally, the unspeakable, mind-twisting terror of the City of the Old Ones.
Binding: Paperback / softback