/lit/ - Literature

So theres this book I read when I was in my teens that i really liked but can't remember the name of or the author.
It's a book about an old, ex nazi living in the US who befriends a neighbour kid and they do stuff or something.
I was pretty sure that it was a Stephen King book because I read alot of his stuff back then back to back. But when I check wikipedia, I can't find any of his books fitting that description.