Burn (Michael Bennett 7) by James Patterson

Having brought an end to the vengeful mission of the ruthless crime lord who forced the Bennett family into hiding, Michael is finally back in New York City.

However, Bennett is thrust straight back into a horrifying case: a witness claims to have seen a group of well-dressed men holding a sickeningly depraved and murderous gathering in a condemned building.

The report reads like the product of an overactive imagination. But when a charred body is found in that very same building, the unbelievable claim becomes all too real…