I got this book through Goodreads' First Reads program! Thank you Goodreads and Amazon!
'Copper Heart' is third in a series, but it works perfectly well as a self-contained, stand-alone story.
Cop Maria Kallio has taken a temporary job in her hometown as acting Sheriff, for the summer. She's a bit emotionally ambivalent about going back to the small mining town she was so happy to escape, and even more emotionally confused about running into Johnny, the object of her unrequited teenage crush.
But things get even worse when an old acquaintance, the free-spirited artist Meritta, is found dead - and Johnny may be the primary suspect.
It's not bad, but it's a pretty formulaic mystery which doesn't transcend genre. There's a murder, there's a cast of characters, all of whom may have some kind of motive for murder, and the investigator does her investigating. Good for light entertainment.