Send in the Clowns

Haunted houses are scary enough without knife-wielding clowns. Especially murderous knife-wielding clowns. So thinks Ellison Russell, single mother, artist, and reluctant sleuth.
Now death wears a red nose and Ellison is up to the blood-stained collar of her new trench coat in costumes, caffeine, and possible killers.

Who stabbed Brooks Harney? And why? Money? Jealousy? Drugs?
With Mother meddling, her father furious, and her date dragged downtown for questioning, turns out Ellison's only confidante is Mr. Coffee.