It's the rare writer who has either a sense of humor or a sense of suspense. Kozak, who acted in such films as ''Arachnophobia'' and ''When Harry Met Sally...,'' has both -- as she displays broadly in her debut novel. Wollie Shelley is the manager of an L.A. card shop who is looking for a man, going on endless blind dates as part of a research project run by a love-lines radio host. The chance of finding a match looks bleak -- until Wollie goes to visit her institutionalized brother, stumbles on a corpse with a bullet hole, and gets kidnapped by a gorgeous ''doctor'' carrying a ferret in his pocket. The mystery aspect of the novel isn't consistently gripping, but the hilarious Wollie is entirely engaging.