Alex Carter notices things other students miss.Like how the new history teacher, Mr. Crowe, never appears in mirrors or photographs. How he knows every student's name without ever being told. How the kids in his first-period class are getting weaker and paler by the day.Most students don't pay attention to these details. Alex can't stop noticing them.When Rachel ends up in the hospital with severe anemia, when Tyler can barely stay awake, when more students start missing school with mysterious exhaustion, Alex realizes the impossible truth: Mr. Crowe isn't human.Together with his friends, skeptical Maya, horror-expert Ethan, and strategic Lena, Alex begins to investigate. What they discover in old yearbooks and employment records terrifies them: a teacher with the same name and face has worked at Thornhill School multiple times across decades. In 1985. In 1962. In 1941. Always teaching history. Always leaving after a few years. Always returning.And always, students get sick.But when the four friends try to expose the truth, they face an impossible obstacle: the adults won't listen. The principal dismisses their evidence. Parents rationalize the strange events. The school administration protects Mr. Crowe, even when confronted with proof of fraud.Alex and his friends are on their own.As Mr. Crowe's feeding grows more aggressive, as the students grow weaker, and as Alex himself becomes a target, the four friends must make a choice: walk away and let the pattern continue, or confront something ancient and deadly with nothing but their wits and courage.But Mr. Crowe has survived for over a century. He knows how to hide. He knows how to hunt. And he knows every move they're going to make before they make it.In a desperate final confrontation, Alex and his friends must use everything they've learned to force a monster out of their school, before someone dies.Perfect for readers who love: Supernatural mysteries with realistic school settingsSmart protagonists who solve problems through observation and teamworkCreeping horror that builds tension without graphic violenceStories where kids must save themselves when adults won't helpLockwood & Co., Goosebumps, Stranger Things vibesTHE TEACHER WHO NEVER REFLECTED is the first book in the Secrets of Thornhill School series, where each standalone story features a new mystery, a new monster, and a school that protects its secrets at any cost.Thornhill School appears normal. But some teachers are monsters. And only a few students are brave enough to notice