Carrie and Ollie are both undercover in the world of Dinsmore’s chocolate factory in the mid-west. For different reason, but with the intent of working on behalf of the employees, they each set out to learn what they can about the behind-the-scenes operations of the factory. I learned a fair bit about early 1900s factory operations. So much happened in the course of the story. Letta and her two brothers still have an additional story to tell, I think. Carrie and Ollie work on the mystery of the elevator shaft death. And, they undercover a bigger problem in that investigation. My disappointment with any character was Mr. Dinsmore, Sr. (Ollie’s dad) who was too much out of touch with plan operations. Carrie and Ollie were great characters with big hearts. It was an enjoyable read that also taught me about factories at the turn of the 20th century.