Karl Gantner, writer


Who am I?

I write science & speculative fiction featuring realistic worldbuilding, complex characters, and exhilarating plots that leave you fascinated…and a bit unsettled.

Connect with me on Twitter/X, read my blog at Substack, or reach out via email.

Published Fiction

Killing a Tiger | Originally published in Analog Science Fiction Magazine, 2022

Do we have reason to fear alien life? A starship captain has to decide weather to allow an unknown probe to leave the solar system and reveal humanity’s presence, or to destroy it

  • Short story
  • Fermi paradox
  • Inspired by Ernest Hemingway’s short fiction

The Species Mill | Buy Here

A novella about a historian reconstructing the past to discover a tragic flaw in human rationality.

  • Amazon best seller
  • Relativistic time dilation
  • Brains over brawn

Charge of the Companions | Free to read (epub)

331 BC, the plains of Gaugemela: Tracking the armies of Alexander the Great, exiled cavalry commander, Nestor of Cappadocia, seeks to free his people and restore his name. But he is running out of time as the final battle between the Persian King Darius and Alexander is about to take place.

  • Historical fiction
  • Alexander the Great

Our Lady of Perpetual Change | Free to read (epub)

A neuroscientist-turned-priest returns to his old discipline after he is blessed by epiphany. But the further his pursues it, the more his church changes around him.

  • Horror
  • Materialism and religion
  • Short story

Karl Gantner, writer


Who am I?

I write science & speculative fiction featuring realistic worldbuilding, complex characters, and exhilarating plots that leave you fascinated…and a bit unsettled.

Connect with me on Twitter/X, read my blog at Substack, or reach out via email.

Published Fiction

Killing a Tiger | Originally published in Analog Science Fiction Magazine, 2022

Do we have reason to fear alien life? A starship captain has to decide weather to allow an unknown probe to leave the solar system and reveal humanity’s presence, or to destroy it

  • Short story
  • Fermi paradox
  • Inspired by Ernest Hemingway’s short fiction

The Species Mill | Buy Here

A novella about a historian reconstructing the past to discover a tragic flaw in human rationality.

  • Amazon best seller
  • Relativistic time dilation
  • Brains over brawn

Charge of the Companions | Free to read (epub)

331 BC, the plains of Gaugemela: Tracking the armies of Alexander the Great, exiled cavalry commander, Nestor of Cappadocia, seeks to free his people and restore his name. But he is running out of time as the final battle between the Persian King Darius and Alexander is about to take place.

  • Historical fiction
  • Alexander the Great

Our Lady of Perpetual Change | Free to read (epub)

A neuroscientist-turned-priest returns to his old discipline after he is blessed by epiphany. But the further his pursues it, the more his church changes around him.

  • Horror
  • Materialism and religion
  • Short story