Leia and Luke are being pursued by imperials on the planet Miban in an attempt to find the Kuibber crystal capable of enhancing one's preception of the Force. They must find it before Darth Vader does.
The review of this Book prepared by anthony mccurry
This story, written after the Empire Strike Back but before Return of
the Jedi, tells of how Luke & Leia stop on a planet occupied
by the Imperials where they discover a powerful gem which
can increase one's ability to use the force. Unfortunately,
Darth Vader hears on the grapevine that they're there, and
comes to hunt them. There's also a minor romance between
Luke and Leia--this was before we knew they were brother
and sister, so it's unintentional incest.
The review of this Book prepared by Steve