Malfunction 61

Ex-cop Derick used to control the Dark River - a strange, Lovecraftian world only those with the gift can enter - but he abandoned it for the sunny beaches of Belize months ago. His time in the sun is cut short when a new mystery draws him back to face a mind-bending threat.
Leaving Deem in control of the Dark River has not gone well. After a long delay, treatments for the worms have finally rolled out - but the treatments are killing people, not curing them. When her boyfriend James goes missing, Deem secludes herself in Eximere, and no one has been able to reach her.
As Derick investigates what has gone wrong, he discovers new dangers forming in the wastelands of the Dark River, capable of massive destruction. Strange clues and bizarre pieces of evidence lead him to a confrontation greater than any the Dark River has seen before - one which he and A may not survive.
Malfunction 61 is Book Five in the Dark River series. It is a fast-paced paranormal adventure and continues the story told in three popular series, the first of which is The Bank Of The River, published ten years ago