The Mostly Invisible Boy, Casey Grimes #1 (Paperback)
A hidden world. A dangerous secret. A kid no one sees—until monsters do.
Perfect for readers who love:
- Hidden worlds and secret schools
- Monsters, mystery, and fast-paced adventure
- Books that hook reluctant readers and reward confident ones
📘 Book 1 of the Casey Grimes Adventures
Ages 9–12 (confident readers up to 14)
Being invisible sounds cool…until no one saves you a seat at lunch.
Casey Grimes isn’t just ignored. He’s actually invisible.
Kids walk into him. Teachers forget he exists.
It might almost be funny—if it wasn’t his real life.
Then Casey climbs a giant oak tree and discovers something impossible:
a hidden fortress, a monster-haunted wilderness, and kids who treat battling beasts like gym class.
Suddenly, he’s not just the weird invisible kid.
He’s a kid who might accidentally die.
This is a monster-hunting academy—
and America’s suburbs are the battleground.
Good news? Casey’s tough, funny, and hard to kill.
Bad news? Everyone else is, too.
With his fearless little sister, Gloria, Casey is pulled into a world of:
- Mythical creature attacks
- Layered mysteries and forgotten magic
- Suspicious teachers and shifting rules
- And yes… absolutely no bathroom breaks
Why Readers Love This Book
⭐️⭐️⭐️⭐️⭐️
“Delivered the whole set to my grandson Tuesday. He was too immersed in reading to even look up from the book to say goodbye when I left!”
— Grandparent reviewer
- Moves fast without being overwhelming
- Smart humor paired with real stakes
- Clean, age-appropriate adventure parents trust
- Short chapters that keep kids reading
“Fast-moving and exuberant, packed with imagination.”
— Kirkus Reviews
Beloved as a read-aloud and devoured solo, The Mostly Invisible Boy brings families together around a story that’s exciting, funny, and impossible to put down.
The Mostly Invisible Boy launches a fast-paced middle grade fantasy series filled with monsters, mystery, and courage hiding in plain sight.
Book one is only the beginning.
Suit up.
Climb the tree.
Face the monsters.
👉 Start the Casey Grimes adventure here.
Want the full adventure?
Save with the Intro Book Bundle (the first three books plus a bonus novella).
Want a signed copy? Leave a note in your cart and I’ll happily sign it at no extra charge.