Cover of The Mostly Invisible Boy by A. J. Vanderhorst
Children's

The Mostly Invisible Boy

by A. J. Vanderhorst

2026

Silver, Wishing Shelf Book Awards Bronze, Readers' Favorite International Awards Contest This "wildly imaginative" (Book Pipeline) "splendid conception" (Kirkus) celebrates courage, tenacity and a little skill with a battle-axe. Set in an alternate USA where magic stirs and monsters prowl, this story is told from the perspective of mostly-invisible-but-still-hopeful Casey Grimes. Eleven-year-old Casey 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, but when he scales a colossal oak, he discovers an enchanted fortress in its branches. The forgotten sentry tree marks the border between his safe, suburban life and a fierce frontier-where beasts stalk backyards and battles are as common as breakfast. Casey and his little sister Gloria infiltrate Sylvan Woods, a secret forest society devoted to ancient, wild things. Sky-high footpaths. Survival sewing. Heroic quests. 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? Hard enough. But Butcher Beasts have returned to Sylvan Woods after a hundred years. Trickery School is under siege. As the mythical creatures close in and the fearsome Sylvan Watch hunts Casey down, he and his newfound friends must unearth the magic buried at the forest's roots-or be devoured along with everyone else, Sylvans and civilians alike. Book 1 in the action-packed Casey Grimes middle grade fantasy adventure series. The wit of Percy Jackson meets the creatures of Fablehaven. Perfect for fans of Harry Potter's magical world-building. Over 250,000 copies sold worldwide-a classroom favorite and family read-aloud, especially for reluctant readers who think they don't like reading. Ages 8-14.

Your rating:

About This Book

The Mostly Invisible Boy is a children's book by A. J. Vanderhorst, first published in 2026 by Lion & Company Press.

At a glance

Genre
Children's
Published
2026

Where to read or listen

Get The Mostly Invisible Boy by A. J. Vanderhorst

These store links are affiliate links (Amazon, Audible, Bookshop.org and Libro.fm). As an Amazon Associate, Eikna earns from qualifying purchases, at no extra cost to you. Learn more.

Overview

What We Know About This Book

Verified Details

GenreChildren's
AuthorA. J. Vanderhorst
Published2026
PublisherLion & Company Press

This book’s full EIKNA intelligence profile is still being prepared. The details shown here come from the current catalog record and may be expanded as our editorial review progresses.

Meet the writer

About the Author

AJV

A. J. Vanderhorst

Reader Reviews

What Readers Say

No reviews yet

Be the first to share what you thought of this book.

Publication Details

Publisher
Lion & Company Press
Published
2026
Language
English
ISBN-13
9781959502265
ISBN-10
1959502263
ASIN
1959502263

The Mostly Invisible Boy: quick answers

Who wrote The Mostly Invisible Boy?
The Mostly Invisible Boy was written by A. J. Vanderhorst.
When was The Mostly Invisible Boy published?
The Mostly Invisible Boy was first published in 2026 by Lion & Company Press.
What genre is The Mostly Invisible Boy?
The Mostly Invisible Boy is a children's novel.

Are you the author? Verify your author profile to manage this book.

This is my book — sign in

Want more books like this?

Let Lyra help you discover lesbian romance books that match your exact mood, favorite tropes, and reading style.