Stone Cold

Link, a teen, is locked out of his house by his mother's boyfriend. He gets his watch stolen, and he loses his money to a crooked landlord, and finally, he ends up homeless on the streets of London. He meets Ginger and the two become friends, and help each other in small ways. And then Ginger disappears.

The story is told in alternating chapters, one by Link and the next by an ex-military mass murderer who preys on the homeless.

One of the 1001 Children's Books You Must Read Before You Grow Up.