The Night Killer (Diane Fallon #8)
Beverly Connor

Diane is driving through a downpour on a windy mountain road after picking up a set of rare Indian artifacts when a tree suddenly slams across the hood of her car, revealing a human skeleton in its hollow trunk.
As she starts to investigate, she's ambushed by a stranger and forced to run for her life. Stranded in the night with a killer, Diane must uncover a secret hidden away by time and distance-or she may not live to see another morning ...