Findings:
- Back to the Future Trilogy
- An American Trilogy
- Empire of Dreams: The Story of the Star Wars Trilogy
- Black Jewels Trilogy
- The Steampunk Trilogy
- Sabriel Trilogy
- Border Trilogy
- Word and Void Trilogy
- The Secrets of the Back to the Future Trilogy
- trilogy (user)
- Samurai Trilogy
- Bridge Trilogy
- Parallels in the two Star Wars trilogies
- Sewer, Gas, & Electric: The Public Works Trilogy
- The Darksword Trilogy
- New Jersey Trilogy Boxed Set Box
- The Alienation trilogy
- New York Trilogy
- The Godfather trilogy
- Gaean Trilogy
- The Christ Clone Trilogy
- The Imperial Radch Trilogy
- The Red Queen's War Trilogy
- The Broken Empire Trilogy
- The Dark Star Trilogy
- The Hobbit Cinematic Trilogy
- The Cornetto Trilogy
- Soul Blazer Trilogy
- The Blademourner Trilogy - A Five Part Saga in Seven Acts.
- The Hunger Games Trilogy
- Liveship Traders trilogy
- Vanishing Hitchhiker
- Schrödinger's Cat trilogy
- the Ants Trilogy
- trilogy
- New Jersey Trilogy
- The Illuminatus! Trilogy
- The Hitchhiker
- The Hitch-hiker
- Gormenghast Trilogy
- The Hitchhiker's Guide to the Future
- hitchhiker's thumb
- The complete solution to the Hitchhiker's Guide to the Galaxy
- The Galilee Hitch-Hiker
- hitchhiker (user)
- The Hitchhiker (user)
- Hitchhiker Joe
- Hitchhiker
- The Armageddon Trilogy
- Crumar Trilogy
- The Finder's Stone Trilogy
- Torch Song Trilogy
- Etienne Trilogy
- Ram Trilogy
- Dark Elf Trilogy
- The Godhead Trilogy
- Wurlitzer Trilogy
- Mars Trilogy
- The Hitchhiker's Guide to the Galaxy
- The Brentford Trilogy
- The Deptford Trilogy
- Indiana Jones Trilogy
- The Star Wars Trilogy
- The Harper Hall Trilogy
- The Tripods Trilogy
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