When a cut-price franchise bakery opens down the street from Earthly Delights and crowds flock to purchase the bread, baker Corinna Chapman is understandably nervous. Meanwhile, her lover Daniel's old friend Georgiana Hope has temporarily set up residence in his house. She's tall, blond, and gorgeous, and it doesn't take Corinna long to work out that she's up to something. Daniel is making excuses and Corinna is worried about his absences. But even more worrisome is the strange outbreak of madness that seems to be centered on Lonsdale Street.Can Corinna maneuver the maze of health regulations, missing boyfriends, sinister strangers, fraudulent companies and back-alley ambushes? Or is Earthly Delights Bakery, well, done?Kerry Greenwood is the creator of the Phryne Fisher series and winner of the Crime Writers' Association of Australia's Lifetime Achievement Award. Trick or Treat is her fourth book to feature baker-cum-sleuth Corinna Chapman.