Seven Footprints to Satan — A. Merritt

Jim Kirkham knew that he was being watched, but by whom? And why? There was only one way to flush these unknown watchers out into the open: to decoy them. And so one evening Kirkham deliberately set out for the loneliest part of New York. He had not gone two blocks when a strangely familiar figure passed him, and be realized with a start that the man was -- himself!

SEVEN FOOTPRINTS TO SATAN is a classic novel of the supernatural forces that lie beyond the grasp of science. A criminal of monstrous appetites and the genius to satisfy them -- who taps the awful powers of Satanism to bend innocent men and women to his will.