Trusted by parents, teachers, and young readers
“Fast-moving and exuberant, packed with imagination.”
— Kirkus Reviews
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“Original and inventive, full of courage and heart.”
— Amy Wilson, author of A Far Away Magic​​​​​​
Awarded by Wishing Shelf and Readers’ Favorite
A wild world just beyond the suburbs
In the Casey Grimes series, mythical beasts aren’t legends—they’re the daily grind. Concealed outside the city limits is Sylvan Woods, a secret world with serious responsibility: monster control. Here, kids are trained to face real danger, solve mysteries, and learn what it takes to survive and advance—with as much style as possible.
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Each book builds the story, rewarding attention while keeping the pages turning at a high rate of speed.
New here? Start at the beginning.
The Mostly Invisible Boy introduces Casey Grimes—an ordinary kid with an extraordinary problem—and the hidden world of Sylvan Woods beyond the edges of his neighborhood. It’s the beginning of a fast, funny adventure where monsters are real, danger is earned, and every choice matters.