Dragonheart: Anne McCaffrey's Dragonriders of Pern #21

The specter of sickness looms over the Weyrs of Pern, felling fire-lizards and threatening their dragon cousins, Pern’s sole defense against the deadly phenomenon that is Thread. Fiona, the young rider of queen dragon Talenth, is about to assume the duties of a Weyrwoman when word spreads that dragons have begun succumbing to the new contagion. As more dragons sicken and die, Weyrleader B’Nik and queen rider Lorana comb Fort Weyr’s archives in a desperate search for clues from the past that...