The Mostly Invisible Boy
The Mostly Invisible Boy
Eleven-year-old Casey Grimes is stubbornly friendly, but he’s eternally the new kid at Vintage Woods Middle School. Students look right through him—and they’re not faking. Casey doesn’t know why he’s mostly-invisible, but when he scales a colossal oak, he discovers a fortress in its branches. The forgotten sentry tree marks the border between his safe, suburban life and a fierce frontier.
Casey and his little sister Gloria infiltrate Sylvan Woods, a secret forest society devoted to ancient, wild things. Sky-high footpaths. Survival sewing. Monster control. Shockingly, people here actually see Casey—but being seen isn’t enough. He wants to belong.
Keeping his identity hidden—while struggling to prove he fits—is hard enough, but Butcher Beasts have returned to Sylvan Woods after a hundred years. Trickery is under siege. As the monsters close in, and the fearsome Sylvan Watch hunts Casey down, he and his newfound friends must unearth abandoned magic, buried at the forest’s roots…or be devoured along with everyone else, Sylvans and civilians alike.


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Book Details


  • Adventure
  • Fantasy
  • For Reluctant Readers

Age Level: 

  • 8 - 12

The Mostly Invisible Boy, by AJ Vanderhorst, is a book about how an intriguing boy finds out a secret that the rest of the world has never known about. When Casey Grimes, the main character, finds out that most people thought he was invisible, he thought it was just a joke being played on him by the other kids. Now, he believes them. As he goes around sixth grade, the teacher doesn’t call on him, the other kids don’t notice him, and he never gets detention because no one notices his mistakes.

Casey Grimes didn’t expect things to be easy when moving to Vintage Woods. He knew it would be hard being the new kid, especially a new kid with a passion for climbing trees. But, things turned out differently than expected. Instead of being singled out, he is forgotten. Soon he realizes that people aren’t intentionally being rude, they just can’t see him. When his mom and dad go on a sudden vacation, he and his sister, Gloria, find themselves the charges of a somewhat eccentric babysitter.

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