Make Room! Make Room!: Harry Harrison

A gangster is murdered during a blistering Manhattan heat wave. City cop Andy Rusch is under pressure to solve the crime and captivated by the victim's beautiful girlfriend. But it is difficult to catch a killer, let alone get the girl, in crazy streets crammed full of people. The planet's population has exploded. The 35 million inhabitants of New York City run their TVs off pedal power, riot for water, loot and trample for lentil 'steaks' and are controlled by sinister barbed wire dropped from the sky.