A horizontal booster was a hyperdrive subsystem. It provided energy to the ionization chamber to facilitate ignition.
- Star Wars: Episode V The Empire Strikes Back (Mentioned only)
- Star Wars Episode V: The Empire Strikes Back junior novelization (Mentioned only)
- Star Wars Episode V: The Empire Strikes Back novelization (First mentioned)
- Star Wars 40: The Empire Strikes Back: Battleground Hoth (Mentioned only)
- A Guide to the Star Wars Universe
- A Guide to the Star Wars Universe, Second Edition, Revised and Expanded
- Star Wars Encyclopedia
- Star Wars: The Annotated Screenplays
- Star Wars: Behind the Magic
- Star Wars Trading Card Game - The Empire Strikes Back (TCG) (Card: )
- Millennium Falcon Owner's Workshop Manual
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