| Chapter 1. | Something Is Definitely Wrong | p. 1 |
| Chapter 2. | The Missing Ferrets | p. 13 |
| Chapter 3. | Partners | p. 30 |
| Chapter 4. | The Jammed Window | p. 49 |
| Chapter 5. | "Unlocking" the Mystery | p. 64 |
| Chapter 6. | A Waiting Game | p. 80 |
| Chapter 7. | Mrs. Donovan Remembers | p. 94 |
| Chapter 8. | A Surprise Visitor | p. 102 |
| Chapter 9. | To Catch a Thief | p. 116 |