Released and published by Rockhill Publishing

The book is available worldwide in e-format in May 2025

“It’s Waterworld meets Neuromancer, with a touch of The Sixth Sense.”

Sabrina Underfoot is no hero. After attacking the largest cities on Gliese 581g, she contributed to a
chain reaction that flooded half the world. Poisoned with power, she’s dying to redeem herself, but
when the world’s most dangerous A.I. hijacks her mind to end humanity, dying may be the price she
pays. When the world is issuing its dying breath, there’s little left to grasp.

Gliese 581g is an unforgiving world where bio-cities get viruses, where you can download your
friends’ emotions as easily as swapping clothes, and where half the planet is so flooded you can
leap off a skyscraper and hit the water a second later.

Sabrina must restore balance, extract the malevolent Id.Entity from her mind, and find redemption
while being hunted by assassins, surveilled by drones, and fired upon by droids. The final battle
must be fought within herself, however, by restoring her faith in love and friendship and finding the
strength to forgive and accept herself. She’ll have to trust old enemies, form new alliances, and save
a mysterious child who may hold the key to everything.

Amazon.com: Killswitch Overkill eBook : Everglade, Mark: Kindle Store

More from Mark Everglade:

As a planet spins out of control, a young geophysicist, Ash, and her father must solve the
ecological crisis using the latest cybernetics, while evading an oppressive regime profiting off
the destruction. 

Gliese 581g is the last remaining colony of the human race,
located twenty light years from Earth. The planet was once tidal
locked to its sun, with one side draped in darkness and the other
half always bright. This changed after a radical group
called O.A.K. increased the planet’s rotation to bring daylight cycles
to all in the name of equality. All was not well, however, as decades
passed, and new generations dealt with continual floods as the
newfound sunlight melted the icecaps. Entire neighborhoods went
aquatic from rising sea levels.

Soon, the planet was spinning out of control, with sunrises
occurring every few hours.

Ash Rivenshear works as a geophysicist at Geosturm, a company
contracted by the New Order to monitor the geological crisis. As she investigates the planet’s
increasing rotation, she uncovers classified data indicating that someone is intentionally
manipulating it to their own ends. An attack on her life is made to cover up the intel. After surviving,
she contacts her estranged father for help, Severum Rivenshear. Having no idea he had a
daughter, Severum agrees to help, but the tension of his absence throughout her life builds as he
works to build a relationship with her.

Ash and her father discover a research lab where Severum uncovers a connection between
Geosturm and the Old Guard, a scion of the now defunct Government of Evig Natt led by Eduardo
Culptos. The Old Guard seek to restore their power over the hemisphere by accelerating the planet’s
rotation at breakneck speed, exacerbating the negative ecological effects, as they convince the
public that the planet was better off in darkness. They’re motivated by the wealth they obtained back
when light was scarce and commodified, and seek a restoration of their influence. Severum catches
glimpse of a scientist being held captive at the lab during his reconnaissance, but he’s forced to back
down due to being outnumbered, and unable at the age of sixty-nine to fight efficiently due to his war
injuries.

Severum approaches K.O.A., an offshoot of O.A.K., for help at their commune where he obtains
equipment, and cybernetic upgrades to offset the effects of aging. Eventually, he learns that most of
those effects were in his mind and not actual limitations.

Amazon.com: Inertia: 9781945286704: Everglade, Mark, Paris, Athina: Books
Inertia eBook : Everglade, Mark, Paris, Athina: Amazon.ca: Kindle Store

What Readers are Saying:

“Severum is positioned as a critique of our vision of a neat split between nature and
corporate existence. The tension of a world that is now connected but with cultural
practices that reflect that old divide was fun to explore!”_ Dr. Joseph Hurtgen, Sci-Fi
Scholar and Professor

About Mark:

Mark Everglade has spent his life studying social conflict. He runs the
website www.markeverglade.com where he reviews cyberpunk media
and interviews the greats. He also runs Cyberpunk Day each year with a
group dedicated to bringing dystopian fiction to a new generation. His
short stories have been featured beside legendary authors like Cory
Doctorow and Walter Jon Williams.