Lovecraft is known for his dreadful creatures, exotic spaces, and his ancient texts of mythologies. Here are some excerpts from one of his short stories, the Book. The book remains title-less.
" I seem to have suffered a great shock perhaps from some utterly monstrous outgrowth of my cycles of unique, incredible experience.
These cycles of experience, of course, all stem from that worm-riddled book. I remember when I found it in a dimly lighted place near the black, oily river where the mists always swirl. That place was very old, and the ceiling-high shelves full of rotting volumes reached back endlessly through windowless inner rooms and alcoves. There were, besides, great formless heaps of books on the floor and in crude bins; and it was in one of these heaps that I found the thing. I never learned its title, for the early pages were missing; but it fell open toward the end and gave me a glimpse of something which sent my senses reeling.
There was a formula sort of list of things to say and do which I recognized as something black and forbidden; something which I had read of before in furtive paragraphs of mixed abhorrence and fascination penned by those strange ancient delvers into the universe’s guarded secrets whose decaying texts I loved to absorb. It was a key a guide to certain gateways and transitions of which mystics have dreamed and whispered since the race was young, and which lead to freedoms and discoveries beyond the three dimensions and realms of life and matter that we know. Not for centuries had any man recalled its vital substance or known where to find it, but this book was very old indeed. No printing-press, but the hand of some half-crazed monk, had traced these ominous Latin phrases in uncials of awesome antiquity.
...For he who passes the gateways always wins a shadow, and never again can he be alone. I had evoked, and the book was indeed all I had suspected. That night I passed the gateway to a vortex of twisted time and vision, and when morning found me in the attic room I saw in the walls and shelves and fittings that which I had never seen before.
...I remember the night I made the five concentric circles of fire on the floor and stood in the innermost one chanting that monstrous litany the messenger from Tartary had brought. The walls melted away, and I was swept by a black wind through gulfs of fathomless grey with the needle-like pinnacles of unknown mountains miles below me. After a while there was utter blackness, and then the light of myriad stars forming strange, alien constellations. Finally, I saw a green-litten plain far below me and discerned on it the twisted towers of a city built in no fashion I had ever known or read of or dreamed of. As I floated closer to that city I saw a great square building of stone in an open space, and felt a hideous fear clutching at me."
The Book, H. P. Lovecraft