The Glasgow Subway Murders

Returning after an extended break, DCI Mike Patterson would have preferred to gradually ease his way back into work.
That was never going to happen.
Patterson is assigned to help with the disappearance of Cheryl Kerr, who goes missing shortly after leaving Kelvinbridge subway station in Glasgow. When her disappearance becomes a murder investigation, a glaring police error in finding her is also revealed. It leads to DCI Patterson being appointed SIO, and the pressure is firmly back on his shoulders. He not only has to find Cheryl Kerr's murderer but in doing so, try and save the reputation of Glasgow West End police station.
When it comes to murder, Glasgow has history
Patterson's investigation soon focuses on a local historical society, the Friends of Old Glasgow. Could one of these eight members be behind Cheryl's murder? And if so, which one?