The Dead Hour by Denise Mina

Another winner by Mina.  Paddy Meehan, investigative reporter, comes of age.  The "wee hen" gives better than she gets, and gets the story, and gets something else, as we learn in the cliff-hanging last sentence.

It's a shame Mina gets marketed as crime fiction -- she's a wonderful, close observer of character and class, with a sharp eye and tongue, this time setting down in 1984 Glasgow, with an Irish-Catholic take on the decline of the Scottish city.