Following the destruction caused during the Borg Invasion, the Romulans, Breen, Tholians, Gorn, Tzenkethi, and Kinshaya joined together in a new alliance called the Typhon Pact. During different missions, the crews of the USS Enterprise, USS Titan, USS Aventine and Deep Space Nine all have encounters with members of the Typhon Pact.
- Each of the first five books in the series focuses different members of the Typhon Pact,
- Zero Sum Game: Breen
- Seize the Fire: Gorn
- Rough Beasts of Empire: Romulans and Tzenkethi
- Paths of Disharmony: Tholians
- The Struggle Within: Kinshaya