Kat Richardson's acclaimed, best-selling Greywalker novels continue to ensnare new fans with each entry. Treading the thin line between the living and the dead, PI Harper Blaine is on a search for a valuable clue about her past when her killer is himself murdered. To find his ghost, she will have to navigate many supernatural dangers-but the chance to shed new light on her previous life and her father's murder is too hard for Harper to pass up. 'Richardson's once-playful Harper is clearly evolving into a supernatural force to be reckoned with.'-Publishers Weekly