The ungrateful dead / Adam Simcox.

Detective Joe Lazarus is missing. The Dying Squad are on the case, but following reports of his sighting, signs suggest he may have fallen back into his criminal ways. A new drug is taking the world by storm. Spook allows the living to see the dead, but its effects are often fatal. The Dying Squad's visit to a Berlin nightclub quickly turns their search into an entirely more sinister case. Because the invention of Spook has another purpose. One that's been decades in the planning. Two worlds are on a collision course the living and the dead's and the Dying Squad must summon all their investigatory cunning to stop a plot that could change people's (after)lives for ever.