The silent sleep of dying by keith mcCarthy.
Mark Hartmann, a consultant pathologist, has problems. 
Married to a barrister and the son-in-law of a judge, he should be enjoying a comfortable life, but his secret vice is gambling. 
Seriously mounting debts are starting to threaten his marriage… 
When he is asked to perform an autopsy on Millicent Sweet, a laboratory assistant, it seems a case much like any other. 
True, Sweet was only 22 when she died of cancer, but then even the young are not immune to that disease. 
His initial findings, however, are shocking. 
A slow but good read. I like the plot but just couldn't get into it. I did manage to read it though. Only 3*. Netgalley and endeavour press

This is the second book in the British Eisenmenger - Flemming Forensic Mysteries. The two protagonists are John Eisenmenger, a former forensic pathologist, and Helena Flemming, a lawyer. This could work as a standalone but there is a lot of history between the recurring characters and background from book one, so I would suggest starting with A Feast of Carrion.
In this second case, Eisenmenger and Helena start investigating some odd deaths of people apparently dying of cancer. Lots of tumours. Lots of cancer. Spreading very quickly. Eisenmenger and Helena discover that the victims used to work for a pharmaceutical company. Blackmail, corruption, murder, lots of forensics and science, a nice dose of humour and some romantic elements, this was a solid thriller/mystery that kept me absorbed for the majority of the time. The characters are complex and continue to develop. I look forward to picking up book three in the future.
The audio is narrated by Sean Barrett, which alone makes it worthwhile listening to this.