A single text message sparked chaos. What followed shattered lives-and exposed a horrifying truth. When a teenage girl receives an anonymous message saying, "I know your secret," she laughs it off. But the texts don't stop. They multiply. They spread. Students begin turning on each other. Trust evaporates. And deep inside a quiet American high school, someone is watching-someone who knows too much. What starts as a cruel digital prank quickly unravels into a chilling psychological game. No one is safe. Not the couple at the center. Not their friends. Not the teachers. And when investigators finally unmask the faceless sender behind the screen, the truth shocks everyone. Based on a true story that stunned the nation, this gripping nonfiction account takes you inside the real-life nightmare of catfishing, manipulation, and digital terror in the modern teenage world. With exclusive interviews, expert insights, and raw survivor accounts, Unknown Number is a powerful exploration of how trust is built-and how easily it can be weaponized. If you think it can't happen to you, think again. Buy your copy now and discover the terrifying true story behind the texts that tore a school apart.