sentences:  "Dragondrums" focuses on Piemur, a secondary character in "Dragonsinger" as a boy soprano, and one apprentice who made Menolly feel welcome.His voice changes and he needs a new occupation, perhaps at the communication drums.Seven Pern books including the Harper Hall trilogy were published before "The Atlas of Pern" (1984), a companion book produced by Karen Wynn Fonstad in consultation with McCaffrey.