Against all odds, Casey Grimes is beginning his studies at Trickery School, one of America's premier monster-control academies. But classes like Extreme Climbing and Land Creature Defense are the least of his worries. He realizes a mysterious enemy is after him-more cunning than a Bog Creep or Hyena Toad. And this secret adversary is playing for keeps.

Praise for Casey Grimes:

"Original and inventive, full of courage and heart." - Amy Wilson, author of A Far Away Magic, Shadows of Winterspell, and The Wild Way Home

"A fun, exciting read...a rich, enticing world. A true adventure, where the stakes are high, the danger real, and [the] goal is almost impossible to reach." - Bookworm for Kids

"Brimming with intrigue, danger and humour." - Book Craic

"The Mostly Invisible Boy is a gripping book from start to finish...riveting." - LitPick

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"Vanderhorst has created a character in Casey Grimes who is so relatable, and so tangible...a must-read fantasy novel for middle grade readers." - Frank Morelli, author of No Sad Songs and the Please Return To series