I started reading Pale as the Dead by Fiona Mountain having had it on the to read pile for some time and found myself quite engrossed. I read the same author's Bloodline some months ago and found it good but I think this earlier novel is better.
Natasha Blake the heroine is a genealogist by profession. She is contacted by a mysterious girl called Bethany who then disappears. Her boyfriend, a photographer, contacts Natasha to give her a diary left behind by Bethany and to ask her to see if she can find the girl. The diary was written by someone apparently close to the Pre-Raphaelite Brotherhood.
These seem to be the only two books in a projected series featuring Natasha which have been published so far as Fiona Mountain's other books are historical novels. I hope she is going to write more of these genealogy based mysteries as they make excellent reading.