Star Trek; Vol. 36; 7 oz.; 253 pages; VG+ PB Unread light shelf wear o/w as new #36 Star Trek. Dilithium. In crystalline form, the most valuable mineral in the galaxy. It powers the Federation's starships...and the Klingon- Empire's battlecruisers. Now on a small, out-of-the-way planet named Direidi, the greatest fortune in dilithium crystals ever seen has been found. Under the terms of the Organian Peace Treaty, the planet will go to the side best able to develop the planet and its resourses. Each side will contest the prize with the prime of its fleet.