Splinter of the Mind's Eye 4

Publisher's Summary
''Mimban is like a million other planets in the galaxy-a lot of trees, too much mud, and not much else. But one of Mimban's abandoned temples holds a powerful gem-the Kaiburr crystal-capable of magnifying and clarifying one's perception of the Force. Luke and Leia know it's there-somewhere-and so does Darth Vader. And that makes Mimban a whole lot livelier right now than those other planets!''