"It was a horror that a single screamed word of their voices had survived, echoing through unthinkable time, distorted, and mocked, and mocking; Takeli-li! Takeli-li!"
At the Mountains of Madness is my first dose of H.P. Lovecraft's cosmic horror, and I am now hooked. If I had to describe this manga in one word, it would be; fantastically weird. But wait, that's two words.. oh well.
The story is about a team of scientists going on an expedition in Antarctica. But as you correctly guessed, everything goes terribly wrong when a team finds some ancient "specimens". In the beginning, I found it was a bit slow,
and it was kinda hard to follow the story. But I got used to it soon enough.
The characters were a bit bland, like they were only there for the sake of the story, and I didn't feel their spirit, and the art made it difficult to tell them apart. Apart from that, Gou Tanabe's two-page spreads were so amazing at times, especially toward the end.
I haven't read the book, so I can't say if it's better, but I have a feeling it can't be much better than this.