Grey Griffins: The Brimstone Key (Grey Griffins: The Clockwork Chronicles, 1)

A brand new adventure starring The Grey Griffins!
Max---the leader
Natalia---the brains
Ernie---the changeling
Harley---the muscle

A year ago, Max, Natalia, Ernie, and Harley were just regular kinds from Avalon, Minnesota, but that was before they learned that evil faeries, werewolves, and other unthinkable monsters existed just beyond our world. Now they are the Grey Griffins: monster hunters, celebrated heroes, and allies to the legendary Templar Knights--but even heroes have to go to school.

This year, they're attending Iron Bridge Academy, a school where students learn to fight against the forces of evil. Here, the Griffins find themselves in a whole new adventure when The Clockwork King, a Templar foe from the past, returns with a deadly plan.