The Wisconsin Werewolf by Alex Gedgaudas

What do people really know about werewolves?
One dark and unfortunate night, Everly realizes she’s been wrong this whole time.
A werewolf is not a handsome boy who shape-shifts under the full moon like the movies want us to believe. Instead, a werewolf is a blood-thirsty monster.
With dead animals being left at her house and a rising body count, Everly and her younger brother, Simon, are on a mission to discover who is the monster causing chaos in their small town.
Turns out, they might be in over their heads. The werewolf may not be acting alone but among a pack.
But what they soon discover is something is even more horrifying.
And now, nothing is as it seems…