An imaginary friend is harmless until his brother tries to kill you.

At thirty-eight, a technical writer has spent years treating Jasper Morgan as an unusually opinionated invention of her own mind. He gives bad dating advice, argues about rodents, and calls her precious. Then her windshield smells of cold ash. A printer asks whether she is home. Her brakes are cut. A man made of smoke begins reaching for her through mirrors, dreams, and electronic screens.

Jasper finally admits the impossible: he is real. The attacker is his brother. And the life she remembers may not be the only life she has lived.

With a skeptical detective, a fiercely practical friend, and two families divided by worlds, she must uncover what happened to her as an infant before the thing hunting her finds a permanent way through. Every answer makes her identity less certain, and every doorway carries a cost.

Dust Motes and Ashes is a character-driven supernatural thriller blending psychological horror, speculative science, dark family secrets, and dry humor. It asks what makes a person real, what love is allowed to justify, and whether survival can become another form of possession.