The fifth in a series of Star Trek: The Animated Series adaptations published by Ballantine Books.

—Complete in this volume—

The Ambergris Element: The crew of the Enterprise explore a submerged culture on a water world.

The Pirates of Orion: While Spock lies ill, Orion pirates hijack the drug shipment desperately needed to save his life.

Jihad: The Vedala, the oldest known space faring race, summon Kirk and Spock to recover the Soul of the Skorr, a stolen religious artifact that has the potential to ignite a holy war across the galaxy.