Brian L. Porter 
The Mersey Monastery Murders [EPUB ebook] 

When a monk is found poisoned at St. Emma’s Priory, the Chief Constable – a friend of the Prior – insists that Andy Ross and his team handle the investigation.
The case turns out to be more complex than they first thought. After a second victim is found with a pitchfork thrust through his body, Ross discovers that to solve the case, they must reopen a cold case from years ago.
When connections to the old East German Secret Police – the Stasi – are revealed, Ross realizes that nothing is as it seems in The Mersey Monastery Murders.