Time travel was supposed to change everything.Instead, it may destroy reality itself.When a breakthrough in temporal science opens a narrow path between timelines, the discovery is hailed as the beginning of a new era. But the technology works only under rare and dangerous conditions, inside what researchers call the compatibility window. Step through at the wrong moment, and the consequences are catastrophic.Then one man sees something he was never meant to see.What begins as a glimpse into another reality becomes a waking nightmare when he realizes the other timeline is not sealed off. It is bleeding into his own. Streets shift. Memories no longer match the world around him. People he trusts seem altered by forces they do not understand. And somewhere inside the fracture is the truth about the experiment that started it all.As the window widens, the boundary between worlds begins to collapse. To stop it, he must navigate a maze of buried motives, shifting alliances, and a technology powerful enough to rewrite history. But every trip across the divide changes more than the timeline. It changes him. And the closer he gets to the truth, the more impossible the final choice becomes:Save his own world,or the one that should never have existed.The Compatibility Window is a high-concept science fiction thriller about fractured timelines, dangerous innovation, and the human cost of trying to outmaneuver time itself. Perfect for readers who love intelligent suspense, reality-bending twists, and near-future stories where every choice can remake the world. The project is positioned as a time-travel thriller built around a rules-based "e;compatibility window"e; mechanism, dual timelines, and escalating personal stakes.Here's a slightly punchier alternate version if you want something more overtly commercial:A breakthrough in time travel created a window between realities.A hidden flaw turned it into a weapon.When a man catches a glimpse of another timeline, he discovers a terrifying truth: the barrier between worlds is failing. As memories shift and reality begins to fracture, he is pulled into a deadly race to uncover who controls the technology and what they are willing to erase to protect it.Every crossing through the compatibility window brings him closer to the answer and closer to losing everything that makes his world his own.Because if the timelines collapse into each other, history will not simply change.It will be replaced.
