Cemetery Dance by Douglas Preston and Lincoln Child

In ten words or less: Smithback is murdered; evidence points to a zombii cult.

Review: Bill Smithback, the investigative reporter who was featured in "The Relic," is killed in a horrific attack in his Upper West Side apartment. His wife, archaeologist Nora Kelly, witnessed the attack and recognized their neighbor, Colin Fearing, as the killer.
But as NYPD homicide detective Vincent D'Agosta and FBI Special Agent Aloysius Pendergast start their investigation, they discover that Fearing died two weeks earlier. Accusations of voodoo and zombies surface, and Smithback's story about animal sacrifices by a reclusive cult points to involvement by the members.

Why bother? Another exciting mystery--with a few paranormal overtones--in the Agent Pendergast series.