Rat Pack (1974)
Billed as "an American Clockwork Orange," but actually something even more disturbing. The book follows four black teenagers on an overnight spree of rape and robbery in "white" Manhattan (i.e. not Harlem). Within the first 30 pages we see them roll a gay John at a public toilet, stumble upon a covert porno shoot in Central Park, and threaten to rape the film's underage actress (a crisis resolved only when the gang's "leader" decides he'll just whip it out and masturbate instead---yes, it's just that gritty). After that it's a night of wandering through the Financial District, Chinatown, Union Square, and other neighborhoods in search of a "big score," culminating in a rather gory finale on the Upper West Side.
It turns out Rat Pack is a fairly rare and sought after book. A basic reading copy in paper appears to go for about $30. So if you see one at Goodwill, buy it. You don't have to read it, and if you feel bad profiting on a book designed to scare white people shitless by implicitly, hell explicitly, equating black youth with the vermin that infest their Harlem tenaments, you can always give the money to the charity of your choice.