Snuff by Terry Pratchett
A Commander Vimes book from the Discworld genre. And really, I think it can be called a genre, since there are like 30 Discworld novels.
The Commander Vimes books really respect being a “copper”. We hear about how being a copper is in your blood, blah blah blah about every third page. The themes of justice are heavy-handed (“Goblins are people, too!”).
But Discworld stuff isn’t hard literature. It’s just silly, easy reading. And a bit addictive.
Don’t start, kids.