What if the signal from space... wasn't meant for us?Commander Elara Myles vanished beneath Triton's ice while chasing a mysterious anomaly. Her final transmission didn't call for help-it warned of something ancient. Something waiting. Not a message, but a key. And Earth was never supposed to find it.Now, a rogue crew disobeys orders and follows the signal to Kepler-22b, a planet cloaked in silence and secrets. What they discover isn't a beacon. It's a system. Vast, intelligent, and already listening.Threshold Signal is the gripping first book in The Threshold Sequence, a cerebral, atmospheric sci-fi saga exploring alien logic, rogue explorers, and the haunting consequences of unintended contact.We weren't the message.We were the keyhole.And someone just turned it.