From the Publisher:
Mardi Gras is a time of madness, a frenzy of celebration, when an entire city seems to lose its mind. But for Steve Giroux, the madness has become all too real. A mysterious voice on the phone wants something from him - evidence of a ghastly, unspeakable murder - and will use all the evil forces at its command to get it. Suddenly Steve is cast into a swirling nightmare of voodoo, black magic, and blood, a nightmare that can only get worse until he delivers what the voice wants. But how can Steve deliver what he's never had?
Bill Pronzini: Masques. Leisure Books, ISBN: 084394501X (March, 1999), 272 p., $4.99