Sign-In
Cart
Threshold
Paperback
Series: The Aperture Cycle, Book 2
Publisher: Independently Published
Published: Jul 11 2026
Pages: 456
Weight: 1.20
Height: 1.13 Width: 6.00 Depth: 9.00
Language: English
The Aperture Cycle: Book Two
Author: Peter I Okafor
Some doors were never meant to be opened.
At the edge of known space, a long-lost aperture awakens-an ancient gateway buried beneath layers of forgotten time. When it opens, impossible signals begin to bleed into the present: fragments of memory, warnings from a shattered future, and traces of something vast, patient, and terrifyingly aware.
As reality begins to distort, a small team is drawn toward the threshold between worlds. What they discover is not merely a passage through space, but a wound in time itself-one that remembers those who cross it.
Memories fracture. Truth becomes unstable. The past refuses to stay buried. And beyond the aperture waits something that does not simply observe humanity-it recognizes us.
Now, before the aperture fully aligns, the team must uncover what lies on the other side and why it was sealed away. But every answer brings them closer to a revelation that could destroy everything they believe about time, consciousness, survival, and the future of mankind.
Because on the other side of the threshold, salvation is not guaranteed.
And some doors, once opened, can never be closed again.
THRESHOLD is a chilling science fiction thriller of cosmic mystery, psychological suspense, memory, time, and the terrifying unknown. A gripping continuation of The Aperture Cycle, perfect for readers who enjoy dark science fiction, mind-bending mysteries, ancient technologies, reality distortion, and stories where the greatest danger is not the void-but what waits inside it.
Also from
Okafor, Peter
Also in
Science Fiction
On the Calculation of Volume (Book I): Shortlisted for the 2025 International Booker Prize
Balle, Solvej
Paperback
Red Rising 3-Book Box Set: Red Rising, Golden Son, Morning Star, and an Exclusive Extended Excerpt of Iron Gold
Brown, Pierce
Paperback