1. Trouble in the Library
2. On an Errand
3. Stranger
4. First Meeting
5. Surprise in the Letterbox
6. Beginning of the Partnership
7. Attack
8. Calling Toby Home
9. Cautious Approach
10. Caught
11. To the Rescue
12. Hero
13. Red Jersey
14. Harriet Turns Vet
15. Break-through
16. The Greatest
17. Cracker of a Throw
18. Tussle of Wills
19. The Slip
20. Special Help
21. In the Old House
22. Awesome Foursome
23. Farewell
24. Afterwards
25. Note to Harriet
26. Mystery Solved
About the Author
By the Same Author