Grave Reckoning. McCall / Malone Mystery, #5

The fifth book of the McCall-Malone Mystery series! As they try to cope with their own relationship, the past comes around to haunt both Clint McCall and Devon Malone: an old foe seeking revenge on McCall and an estranged relative seeking help from Malone. Meanwhile, they're hired by a woman to find her daughter who's been missing for more than a decade and might now be a member of a sinister  cult headquartered in the Portland area, a cult apparently willing to kill to protect its own.
McCall and Malone find themselves facing deadly threats from both the past and the present as they desperately race to find the young woman and keep themselves alive.