The world was wrong about Bigfoot.

It was never hiding in the forest.

It was maintaining something underneath it.

Six months after opening the ancient relay, Charlie Hudson is still dealing with the consequences. The Founders' record is slowly entering the world, the signal from beyond is still coming, and everyone at Groom Lake is pretending that "careful" is a plan.

Then a new message arrives from deep inside the Earth:

WE ARE STILL HERE.

The signal is not from Agartha.
It is not from the relay.
It is not from anything humanity has built.

It is coming from four hundred kilometres below the Nevada desert, from a structure older than the Founders, older than recorded history, and old enough that even the people who built the relay chose to quarantine it.

To investigate, Charlie joins a team that includes a disgraced cryptogeologist, a tactical specialist who trusts absolutely nothing, a drone called CLARENCE with an unfortunate commitment to honesty, and Steve, who has once again known more than he was saying.

What they find underground will rewrite decades of cryptid sightings, expose a global network of hidden nodes, and reveal that Bigfoot was never a myth.

It was a symptom.

Now the Underlayer is awake, the old quarantine is gone, and something else has heard humanity answer.

Charlie is not qualified for any of this.

Unfortunately, he has become the person reality keeps putting closest to the door.

Fast, funny, strange, and packed with secret facilities, deep-earth mysteries, classified weirdness, ancient systems, Bigfoot, aliens, and one very tired man with an alarming survival rate, Bigfoot Goes Underground is Book Two of The Charlie Hudson Files.