The "Diary of a Wimpy Kid" series currently has 17 books:
1. Diary of a Wimpy Kid
2. Diary of a Wimpy Kid: Rodrick Rules
3. Diary of a Wimpy Kid: The Last Straw
4. Diary of a Wimpy Kid: Dog Days
5. Diary of a Wimpy Kid: The Ugly Truth
6. Diary of a Wimpy Kid: Cabin Fever
7. Diary of a Wimpy Kid: The Third Wheel
8. Diary of a Wimpy Kid: Hard Luck
9. Diary of a Wimpy Kid: Double Down
10. Diary of a Wimpy Kid: The Long Haul
11. Diary of a Wimpy Kid: Old School
12. Diary of a Wimpy Kid: Wrecking Ball
13. Diary of a Wimpy Kid: The Getaway
14. Diary of a Wimpy Kid: Big Shot
15. Diary of a Wimpy Kid: Diper Överlöde
16. Diary of a Wimpy Kid: The Deep End
17. Diary of a Wimpy Kid: Big Fat Lie
You may be thinking of a different book, or perhaps there's a fan-made story with that title.