Earthcore

The concept of hidden alien civilizations beneath Earth's surface is so intriguing. I'm curious whether this idea came from scientific theories or pure imagination.

The story kept me on edge from start to finish, but I wondered if the rapid pace was planned to mirror the chaos of the situation or if it evolved naturally.

The horror scenes felt visceral without overshadowing the adventure. I'm interested in how the author decided where to draw the line between suspense and gore.