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About The Book

A terrifying new novel from bestselling #HorrorBookTok sensation Ania Ahlborn—the acclaimed author of the modern classic Brother.

Hailed as a writer of “some of the most promising horror I’ve encountered in years” (Seanan McGuire, author of the Ghost Roads series), Ania Ahlborn delivers a novel that pushes the boundaries of horror into a new realm.

Isla Hansen, a mother reeling from a devastating loss, is beside herself when a mysteriously orphaned child appears on the outskirts of the Hansens’ secluded Colorado property. Although strange and unexplainable, the child’s presence breathes new life into Isla. But as the child settles in, Isla’s husband, Luke, and their five children notice peculiarities that hint at something far beyond the ordinary—anomalies that challenge the very fabric of reality itself. The tension within the Hansen household grows, and with it, the sense that there is something very wrong with the new kid in the house.

The Unseen is a haunting tale that walks the line between the familiar and the unknown, drawing us into a chilling narrative where reality itself feels just out of reach.

About The Author

Photo courtesy of the author

Born in Ciechanów, Poland, Ania Ahlborn is also the author of the horror thrillers Seed, The Neighbors, The Shuddering, and The Bird Eater. When she isn’t writing, she enjoys exploring the darkest depths of the human (and sometimes inhuman) condition.

Product Details

  • Publisher: Gallery Books (September 11, 2025)
  • Length: 384 pages
  • ISBN13: 9781668057667

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Raves and Reviews

"The trauma of motherhood and ever-shifting family dynamics are at the heart of this terrifying narrative. Combining the uncomfortable truths of grief with tense, speculative horror, The Unseen is chilling, unsettling, and absolutely riveting." —Tanya Pell, author of Her Wicked Roots and Cicada

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