Bloodshed in the Badlands

Wren's new writing assignment, a haunted campground in Arizona, is perfect except for the killer who wants her dead.
Best job ever, except she and Rascal, her sweet black and tan Labrador Retriever, discover a crime in Arizona that only she can solve, much to the dismay of the young, widowed county Marshal and the campground's resident ghost.
The serial killer looks forward to reading her obituary.