| Zbounty |
Bounty Trilogy
| Charles Nordhoff & James Norman Hall | Little, Brown & Company | LIT7-20 |
| Zhitch |
Hitchhiker's "Trilogy" set
| Douglas Adams | Ballantine Books | LIT7-20 |
| ZAustenSoft |
Jane Austen Softcover Collection
| Jane Austen | Penguin Putnam | LIT6-19 |
| ZSpaceH |
Space Trilogy - Hardcover Set
| C. S. Lewis | Simon and Schuster | LIT7-20 |
| Zspace |
Space Trilogy - Quality Softcover Set
| C. S. Lewis | Simon and Schuster | LIT7-20 |