The Mostly Invisible Boy, Casey Grimes Book 1 (Paperback)
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
- Sneaky mysteries and forgotten magic
- Suspicious teachers and lurking creatures
- And… 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 and doesn't talk down
- Smart humor with real stakes
- Clean, age-appropriate adventures parents trust
- Short chapters 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.
Suit up.
Climb the tree.
Face the monsters.
📘 Book 1 of the Casey Grimes Adventures
Ages 8–14
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.