Dead Mann running : a Hessius Mann novel is the latest in the series by Stefan Petrucha. 

It features chakz detective, Hessius Mann. If you missed the first book in the series,

a chakz is a zombie of a different sort. Set in near future, the nation is plagued by a rash of

innocent people executed by the government. A company named ChemBet offers a solution

in the Radical Invigoration Procedure (RIP).  It can bring back the recently departed. 

Problems developed when the chakz were discovered to have lost some brain function.

If they are isolated with little or no social interaction then they could become feral in other

words they are a new breed of zombies. Mann has better mental function than most.

Needing money the ex-cop, Mann becomes a private detective.

The story opens when a severed arm...just an arm...drops off a briefcase containing  a

mysterious blue chemical. Mann is debating whether to investigate when the attacks

begin. The story is filled with intense action, gory descriptions, and sympathetic

characters. The violence is eased by a wicked vein of dark humor that is blended

into the narration.

If you’re a zombie fan Dead Mann running : a Hessius Mann novel will be very enjoyable.

If you’re a newbie to paranormal urban fantasy told in a gritty style, it is a great introduction

to the genre. The only problem I had with the book is wondering how the

author is going to proceed in this series.