DRAGONRIDERS OF PERN by Anne McCaffrey, arguably the best sci fantasy ever written. Humans have colonized the planet Pern in the Rukbat star system, but have lost much of their technology and history due to periodic onslaughts of Thread, a spore that voraciously consumes all organic material. The Pernese use intelligent firebreathing dragons to fight Thread. A human rider has a telepathic bond with their dragon, formed by Impression at the dragon's hatching. #Fantasy #fantasybooks #sciencefictio