Edge of Reality — Charley Marsh

Sanity is madness put to good use. George Santayana

Sydney Waters stares out over the brittle, seared land three hundred feet below. How to cross four hundred miles of desert with a blind man and a dog? 

Before Sydney can change course, the cliff edge breaks away. Her companion tumbles down into the desert. 

The only way out a cave that leads deep beneath the state of Nebraska.

No turning back now. 

Book Two of the Upheaval series, Edge of Reality takes the reader on an extraordinary and unexpected adventure in a world turned upside down.