"American fiction 20th century." . . . . . . . . . . . . . . . "It has been years since the dreaded \"threads\" descended on Pern, and the inhabitants, busy with daily pursuits, no longer worry about the danger. Now, with only a few dragons left who can take to the skies and destroy the threads, they suddenly begin falling again." . . "Dragonriders of Pern. Volume II, The Dragonquest" . "Fiction" . . . .