The Mostly Invisible Boy

Casey Grimes Book 1

Children - Fantasy/Sci-Fi
292 Pages
Reviewed on 06/20/2020
Buy on Amazon

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Author Biography

AJ Vanderhorst has had many jobs, including journalist, paramedic, escape artist, and baby whisperer. One time in fifth grade, he built a traffic-stopping fort in a huge oak tree, using only branches and imagination, and slept there for a week.

Now he and his wife live in a woodsy house with their proteges and a ridiculous number of pets, including a turtle with a taste for human toes. This makes AJ an expert on wild, dangerous things—invisibility spells, butcher beasts, hungry kids, you get the idea.

He is the only author in the world who enjoys pickup basketball and enormous bonfires, preferably not at the same time. He and his family have drawn up several blueprints for their future tree castle. Visit AJ online at

    Book Review

Reviewed by Gail Kamer for Readers' Favorite

In AJ Vanderhorst’s The Mostly Invisible Boy: Casey Grimes Book 1, an eleven-year-old boy struggles with the real fact that he can’t be seen all the time. Why? How to fix this? Casey doesn’t know. He just knows every day there are times when he is invisible. While out exploring one day, he climbs an enormous old oak tree, and his life changes forever. In the branches, Casey discovers he lives on the edge of his regular world and that of a fierce outlying region of another. One that involves monster control, witches, and Trickery School. He’s no longer sort of invisible, he’s fully visible to everyone, but his presence is not accepted by some. He adopts a new identity but that too leads to serious consequences for him, his young sister, and others in his new world. How will Casey handle his identity crisis? Like a true trooper!

AJ Vanderhorst’s The Mostly Invisible Boy shares the ever sensitive worry of young people—fitting in with others and the struggle with their own identity. The theme is shared through the eyes of an eleven-year-old Casey who really is invisible sometimes in his regular world but wishes to be seen. Vanderhorst connects to the deep feelings many middle school children deal with day in and day out. The Mostly Invisible Boy would make a great book for counseling classes in school settings as well as a shared reading with children and parents. If you are searching for a way to broach this subject with a troubled young one, this is the book for you.