The Last Hot Time — John M. Ford

When Danny Holman leaves the cornfields of Iowa for the bright lights of Chicago, he expects his life to change. He just can''t guess how much and how fast. A violent incident on the road brings Danny the favor of a man known only as Mr. Patrise, who gives Danny a job, a home, and a new identity.

The City is a different world from the one Danny--now called Doc--knew, and literally so. Long-vanished powers have returned, and more is going on in the streets than nightlife and street warfare. Power is gathering: a power rooted in terror, madness, and death. To fight it will require Doc to face what he fears most. To defeat it will take something more than courage.