The Threshold Fold: A Deep-Space Time Travel Thriller. The Time Fold Trilogy, #1

A mission to Pluto was supposed to prove the future had arrived. Instead, it proves time can break. In 2135, Dr. Elise Navarro is a causality theorist whose work has always lived at the edge of the possible. Then an unexpected vacancy places her aboard the Threshold, an experimental deep-space vessel bound for Pluto and powered by the most advanced drive ever built. The mission is dangerous. Historic.
Unprecedented. But it is also supposed to be controlled. At the edge of the solar system, the impossible begins. The ship's instruments return readings that contradict reality. Walls appear in two places at once. The onboard AI begins processing patterns it cannot explain. Then the Threshold is swallowed by a temporal anomaly and thrown out of its own century. Now Elise and the crew are stranded in the past, carrying technology that should not exist, knowledge that could destroy history, and a ship that may be the only key to getting home.
Every move risks changing the future. Every calculation could trap them forever. And the deeper Elise looks into the anomaly, the more terrifying the truth becomes: the time fold may not be an accident. Something hidden in the data points toward a catastrophe still waiting to happen, and a future that may already know the Threshold's name. To survive, the crew must outwit impossible physics, evade detection, protect history, and trust an AI that may understand more than it is willing, or able, to say.
Because the past is not the only danger. The future is reaching back. The Threshold Fold is a high-stakes sci-fi thriller packed with deep-space danger, time travel mystery, artificial intelligence, impossible choices, and a crew racing against the collapse of causality itself. Perfect for readers who love cerebral science fiction, temporal anomalies, space exploration thrillers, and stories where one wrong decision can fracture history.