The Substitute Who Wasn't One Person

By Evelyn Grey

When the substitute teacher knows too much, Maya Lewis starts asking questions no one else will.

Mrs. Henderson is on maternity leave, and Thornhill School has a new substitute: Ms. Evelyn Gray. She's professional, organized, and knows the curriculum perfectly. But Maya notices something strange. Gray seems to know students' names before they introduce themselves. Her teaching style shifts dramatically between classes. And she's never seen in mirrors.

When Maya starts investigating, she discovers Gray isn't just copying the teachers at Thornhill, she's absorbing their identities. Email accounts get hacked. Passwords stop working. Personal information goes missing. And students who pay attention start to feel like they're going crazy, because no one else seems to notice.

With her friends Alex and Lena, Maya races to stop Gray before she fragments completely and exposes secrets Thornhill School has been hiding for over a century. But the closer they get to the truth, the more Maya realizes that stopping one monster might not be enough, and that some victories come with a terrible cost.

Perfect for fans of Lockwood & Co. and readers who love mysteries where the impossible hides in plain sight, The Substitute Who Wasn't One Person delivers suspenseful investigation, creeping horror, and the burden of knowing things no one else will believe.

Book 3 in the Thornhill School Mysteries series. Each book is a standalone story.

• Format: Paperback
• Language: English
• ISBN: B0GKXL7LF4
• ISBN13: 9798246384824
• Release Date: January 2026
• Publisher: Independently Published
• Length: 176 Pages
• Weight: 0.54 lbs.
• Dimensions: 0.4" x 6.0" x 9.0"