This is the first book I have read by Heather Graham, the multiple award winning romantic suspense author. And honestly speaking, it left me cold. 
 The premise is intriguing enough...a woman is murdered by her husband who is supposed to have been killed by the mafia. Even as FBI agent Brett is investigating the case more such murders by 'dead men' are revealed and the media goes ballistic about 'zombie attacks'. Meanwhile, Lara who has just started working at Sea Life, a dolphin research facility, gets a shock when one of the dolphins brings up a human body part. There is a paranormal angle in it as both Brett and Lara begin to connect with the ghosts of the murdered woman (Maria) and her husband (Miguel). Being part of the Krewe of Hunters series, there are special agents who specialise in solving crimes with the help of ghosts. Apart from this there is an angle about medical research too. 
 While it is an easy enough read, there are too many characters (on both sides of the good vs evil divide). The paranormal angle isn't spooky enough. Besides it is a bit of a stretch to imagine that not only the Krewe Hunters but Brett and Lara too are able to easily communicate with ghosts. The writing does not create enough suspense nor is there much of a romance angle. It's unlikely that I will ever read any other book in this series.