Technically, 2 stars means "it was o.k." I often hesitate to rate a book 2 stars unless I didn't like it much. No Stone Unturned was right on the cusp between 2 and 3 stars, but I hesitate to rate it 3 because there's too many shortcomings.
It was, indeed, an "ok" read. The whole vibe was "mystery lite" -- y'know, fewer calories, less fullness of story telling and plot, but entertaining for a brief period. The protagonist, Ellie Stone was just too unbelievable and unrealistic. We're supposed to believe that she's a hard drinking, smarter than most of the men around her, liberated 60's kind of gal who, as a reporter does more detective work than two police forces combined in solving two murders some 200 miles apart. Those poor dopey cops... they should just listen to Ellie and they'd be so much better off. But, due to the times and societal norms, they can't take her too seriously; after all, she's "just a girl."
But Ellie, undaunted, discovers three little oil spots on the dirt road near the 1st murder, a Dr. Pepper bottle cap in the shallow grave, and using her reporting instincts and camera, begins to unravel the mystery surrounding the murder of a beautiful 21-year-old society girl. And in so doing, manages to encounter lots of potential suspects (plenty of red herrings here) and endangers herself to boot.
The main problem with an otherwise nice plot is the storytelling itself. Too many times does Ellie plow ahead into obviously dangerous situations. Too often does she interfere with police investigations, withholding evidence, lying, misleading, etc. to be believable. The author seems to try too hard to make her special, tough, as good as any man, but still able to flirt and use her feminine wiles when that can help her get what she needs. The best parts of the story involve the author's reference to the time in which the story is set. Gleem toothpaste, Breck shampoo, glass bottles of Dr. Pepper for 15 cents from a vending machine, film cameras and flash bulbs. These are but a few of my favorite things....
So, it's an "ok" read; not great, not terrible, 2. 5 stars, rounded down.