Devil's Own Daughter by Meg Hutchinson
A feature on Old Wives' Tales is not exactly the assignment to make Kate Mallory's pulse race. She fancies herself an investigative journalist and crime reporter and has the stories under her belt to prove it. But her research throws up a vital clue to the series of arson attacks and gruesome murders that is baffling the Darlaston police force.
Teaming up once more with Richard Torrey, the enigmatic man whose tough exterior conceals his intuitive psychic powers, Kate gets on the trail of a story too good to miss. But it will lead her into a deadly encounter with a ruthless woman, a coven of Satanists - and Evil incarnate.