Murder by the Stroke - C S McDonald - Bog

Detective Landry's old flame is drop-dead gorgeous, and so are her paintings!
Pittsburgh's most influential cultural enthusiasts are overjoyed when famous artist, Vashti, has scheduled a gala followed by a weeklong exhibit of her latest works. On the other hand, Detective Nathan Landry isn't so excited about the invitation he has received to the gala. Back in the day, he and the renowned painter were lovers. That is, when her name was Sadie Jensen, or as Nathan's sister liked to call her, "Psycho Sadie."
Art experts, and collectors alike, have been intrigued by a tiny brush stroke, known as an invisible stroke. So subtle and out of place is the technique, that Vashti's elusive stroke has become as famous as a Where's Waldo search.
Meanwhile, Fiona finds herself captivated by more than Vashti's flair for the obscure. Rather, she is far more interested in the gorgeous artist and Nathan's past. Against his wishes, Fiona, her mother, and her mother-in-law attend the exhibit.
Indeed, Vashti's paintings are killing it in the art world, and in more ways than one.