American Golem: The New World Adventures of an Old World Mud Monster by Marc Lumer
The book at Amazon
One day, a kid arrives in America.
Everything here is big,
He creates a golem, an old-country mud monster, to protect him from the kids next door. But the golem was meant for old-world fears, and things are different here in the New World.
Now what will his golem do, with no one to protect?