The Final Door - Part One

Important Note for readers:
"The Final Door" is the largest case-story Inspector Walter Darriteau has ever been involved in. The full investigation runs to over 700 pages and has been split into Parts One and Two. The book promoted here is Part One only. Readers should know all plot threads will not be resolved during Part One. Here's the blurb.
On a squally November night beside the Dee estuary on the Wirral peninsula, a man falls to his death from Thurstaston cliffs.
But is it an accident, suicide or murder? And who is the victim, and if it is murder, who killed him? Thirty minutes later, a pair of tripping, giggling kids ring the emergency services to report the incident.
Wirral police are busy dealing with a catastrophic traffic pile-up on the M53, and seek help from neighbouring Chester. At midnight, Inspector Walter Darriteau is disturbed at home and asked to attend the incident to examine the scene, and secure the body.
So begins "The Final Door - Part One", the eleventh book in the Inspector Walter Darriteau series, a chunky story that takes the reader on a journey no one could have foreseen after one phone call set everything in motion.
Earlier books in the series:
The Murder Diaries - Seven Times Over
The Sound of Sirens
The Twelfth Apostle
Kissing a Killer
The Legal & the Illicit
The Death Broker
Five Dead Rooks
Old Cold Bones
The Missing Man
Falling