Cold Wars (Star Trek New Frontier: Gateways, Book 6)

Meditation: Gateway to Light

Discovering Computers 2004: A Gateway to Information, Complete (Discovering Computers)

Gateway to a Vast World

Gateway to Empire

Gateway to Atlantis: The Search for the Source of a Lost Civilization

Demons of Air and Darkness (Star Trek Deep Space Nine: Gateways, Book 4)

Doors into Chaos (Star Trek The Next Generation: Gateways, Book 3)

Gateways #7: What Lay Beyond (Star Trek)

Using Computers: Gateway to Information