bk.1. The cat came back -- bk. 2. Shaggy's nice hot breakfast -- bk. 3. The ski lesson -- bk. 4. The clue in the closet -- bk.5. The birthday party -- bk. 6. Shaggy's cheesy lunch -- bk. 7. Scooby bakes a cake -- bk. 8 A whiff of pizza -- bk. 9. Ding-dong pizza -- bk. 10. The marching band -- bk. 11. Too many ghosts -- bk. 12. Sounds in the cellar.