The Werewolves of Riverside Park by Kenneth Jorgensen
Randal Regulus was a normal teenager in a normal family with normal friends. Then he learned that the “normal family” part was a lie. His parents were actually professional monster hunters, with a secret armory and everything! Randal thinks that nothing could be better when his parents invite him to be a monster hunter too.
But Randal quickly learns that being a monster hunter is a lot less fun than it sounds. His first encounter with a monster goes badly. Then he has to keep secrets from his best friends Kate, Kirby, and Grant, and will have to go away for training over summer vacation.
Things go from bad to even worse when Randal learns that the trailer park near Kirby’s grandmother's house is overrun with werewolves. Soon Randal has to use all his courage and skill to keep himself and his friends alive as the werewolves hunt and corner him and his friends.
The Werewolves of Riverside Park is the first book of the Randal Regulus: Monster Hunter series. It is a funny and lighthearted story of courage and discovery that will appeal to teenagers, their parents, and everyone else.