Hounding the Moon. Tess Noncoire Adventures, #1

The reason there have been no verified demon sightings in the past fifty years is that they are all hanging out at Science Fiction/Fantasy conventions, winning costume awards. Tess Noncroiré, lost her husband of three months in motel fire. In a fever of grief, she drives blindly into the desert and disappears for a year. She emerges fifty pounds lighter and a Sister of the Celestial Blade Warriors, trained to combat demons.
An interdimensional imp, Scrap, rides her shoulder. In the presence of a demon or tremendous evil, he transforms into a celestial blade, the only weapon capable of penetrating demon hide. Two years later, Tess has nearly forgotten her time at the Citadel, but she wrote a bestselling fantasy novel about her time there. She and Scrap, when traveling to Science Fiction/Fantasy Conventions, land in the middle of a native legend come to life.
The Pacific Northwest tribes must protect a specially woven blanket that incorporates human dignity, honor, and courage woven in the ancient way. While the weaver sleeps, her dog must rip out her daily weaving. If the blanket is ever finished the world will end and humanity will die. The old weaver is murdered and the dog searches among adolescent girls of shamanistic descent for someone to take her place.
The demons have other plans for the blanket. Can Tess keep the new weaver and her hell hound safe while dodging the devious manipulations of potential lovers and a possessive research assistant/anthropology professor who doesn't know how, or when to shut up?