Nova - Samuel R. Delany

Nova (1968) is a science fiction novel by Samuel R. Delany. Nominally space opera, it explores the politics and culture of a future where cyborg technology is universal, yet major decisions can involve using tarot cards. It has strong mythological overtones, relating to both the Grail Quest and Jason's Argonautica for the golden fleece. Nova was nominated for the Hugo Award for Best Novel in 1969.
By the year 3172, political power in the galaxy is split between two factions: the older Earth-based Draco and the historically younger Pleiades Federation. Both have interests in the even newer Outer Colonies, where mines produce trace amounts of the prized power source Illyrion, the superheavy material essential to starship travel and terraforming planets.