Blog Tour Spotlight: The Mostly Invisible Boy by AJ Vanderhorst

Today I’m bringing attention to the book The Mostly Invisible Boy by AJ Vanderhorst. I’ll take you through the blurb, about the author, and a few tour excerpts!


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 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.

A fast-paced middle grade fantasy/adventure book with all the monsters kids could ever hope for.

Book CWs: For a list of warnings, tropes, and representation for this book, check out its page on

Purchase on Amazon US (affiliate link)

About the Author

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

What readers have to say

I love his relationship with his sister, Gloria. He never disparages her ideas or tells her that she is imagining things. He protects her as much as he can but ultimately lets her stand up for herself. Gloria, in fact, is the heroine in several of their adventures and he never feels slighted by this, instead, he is proud of her achievements. This is such a refreshing and delightful depiction of sibling relationships.

Broken Geek

AJ Vanderhorst has the most beautiful imagination. The way Vanderhorst puts this world in your mind is nothing short of brilliant. The journey to the Sylvan Woods had me on the edge of my seat, and I wouldn’t have it any other way.

My Bookish Bliss

I absolutely love the world that AJ Vanderhorst has created here, he really does have a wonderful imagination. It kind of gives off treetop Percy Jackson vibes, and I am totally here for it.


The characters are all so witty and eloquent, and yet the dialogue feels so natural and flowing. The story itself is fast-paced and fun, it doesn’t ever get stuck on anything or leave you bored.

The Artsy Reader

A great little middle grade novel and loads of fun to read.  Descriptive and creative and extremely enjoyable.

Herding Cats

Disclaimer: Most posts made on this blog will include affiliate links, identified by the phrase (affiliate link). As an Amazon Associate I earn from qualifying purchases. This comes at no additional cost to you.

2 thoughts on “Blog Tour Spotlight: The Mostly Invisible Boy by AJ Vanderhorst

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