Corinna Chapman, baker extraordinaire, returns, along with the eclectic and lovable community of characters that populate her world. A franchise bake-shop has opened down the street, selling low-priced (and low-quality) wares. Hallowe'en brings an international convention of witches to Melbourne, casting wild magic in the air. Daniel Cohen investigates wartime secrets and ancient betrayals among Melbourne's expatriate Greek community. A mysterious voice is singing out in the night, wassailing and calling for soul cakes. An unidentifiable drug seems to have hit the streets, creating chaos in Calico alley. An old friend of Daniel's is coming to visit-with intentions that Corinna suspects are less-than honorable.

Trick or Treat the fourth of Kerry Greenwood's cozy, quirky, antipodean Corinna Chapman mysteries.