Sign-In
Cart
The Substitute Who Wasn't One Person
Paperback
Series: Thornhill School Mysteries
General Juvenile FictionHorror
Publisher: Independently Published
Published: Jan 31 2026
Pages: 176
Weight: 0.49
Height: 0.44 Width: 6.00 Depth: 9.00
Language: English
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.
Also in
General Juvenile Fiction
Percy Jackson and the Olympians, Book Two the Sea of Monsters (Percy Jackson and the Olympians, Book Two)
Riordan, Rick
Paperback
Percy Jackson and the Olympians, Book One the Lightning Thief (Percy Jackson and the Olympians, Book One)
Riordan, Rick
Paperback
Anne of Green Gables, 3-Book Box Set, Volume I: Anne of Avonlea; Anne of the Island; Anne of Green Gables
Montgomery, L. M.
Paperback
Percy Jackson and the Olympians: Sea of Monsters, The: The Graphic Novel
Venditti, Robert
Riordan, Rick
Paperback
Mary Anne Saves the Day: A Graphic Novel (the Baby-Sitters Club #3): Full-Color Edition
Martin, Ann M.
Paperback
Dog Man: Big Jim Believes: A Graphic Novel (Dog Man #14): From the Creator of Captain Underpants: Volume 14
Pilkey, Dav
Hardcover
Rowley Jefferson's Awesome Friendly Spooky Stories 2: From the Creator of Diary of a Wimpy Kid
Kinney, Jeff
Hardcover
Investigators: Agents of S.U.I.T.: Sew Much Trouble
Green, John Patrick
Hastings, Christopher
Hardcover
Wings of Fire: The Dragonet Prophecy: A Graphic Novel (Wings of Fire Graphic Novel #1): Volume 1
Sutherland, Tui T.
Paperback
Dog Man: Big Jim Begins: A Graphic Novel (Dog Man #13): From the Creator of Captain Underpants: Volume 13
Pilkey, Dav
Hardcover
Cat Kid Comic Club: Collaborations: A Graphic Novel (Cat Kid Comic Club #4): From the Creator of Dog Man: Volume 4
Pilkey, Dav
Hardcover