Malcolm Archibald 
The Scuttlers [EPUB ebook] 

When Sergeant George Watters is assigned to a scuttling case, he thinks he can solve it in a few days. Instead, he discovers a connection to a string of burglaries of high-value shops and hotels across Dundee.
Things take a turn for the worse when one of Watters’ informants tells him that someone from the police force is involved in the burglaries. Soon, George realizes that the mystery runs deeper than he expected.
Can Watters solve the case and bring the burglars, and their accomplices, to justice?
Set in Scotland’s fourth-largest city in the 1860s, The Scuttlers is the fourth book in Malcolm Archibald’s Detective Watters Mysteries series.