This is a fine detective novel. It is a debut novel by a retired UK detective. I certainly hope that he continues to write fictionalised stories of his life as a detective.
The story takes you deep into the life and trials of a police detective. His home life, personal experiences, and the procedural part of being a dedicated detective. This has a bit of a noiresque quality. It is dark in substance and you may not agree with the personal choices but you will probably understand them. Personally I really enjoyed the writing style, depth of characters, and will certainly read more by the fine author.