Deeper Than the Dead - Debra Webb

Someone's found the skeleton in the closet, and it's not the only one. Wall Street Journal bestselling author Debra Webb presents an emotional new mystery. Crime analyst and newly disgraced deputy police chief Vera Boyett doesn't visit home often, and she certainly doesn't venture back into the cave on her family land. But when the remains of her long-missing stepmother are discovered, Vera will have to face a past that threatens all she is.
She and her sister Eve had a fairy-tale childhood: good until it was tragic, with a stepmother they never found a bond with. At least they had each other, a baby half-sister, and a mutual devotion that would have them do the unthinkable.
It's a summer in small-town Tennessee, so thick with humidity it could drown you and so rife with secrets it could smother you. And deep beneath the surface, there are more bodies than you'd think.