Wikipedia
Dragondrums
Dragondrums is a young adult science fiction novel by the American-Irish author Anne McCaffrey. Published by Atheneum Books in 1979, it was the sixth to appear in the Dragonriders of Pern series by Anne or her son Todd McCaffrey.
Dragondrums completed the Harper Hall of Pern trilogy one year after The White Dragon completed the Dragonriders of Pern trilogy. Boxed and omnibus editions of both trilogies soon followed.