Dragonriders of Pern Series by Anne McCaffrey

HOW CAN ONE GIRL SAVE AN ENTIRE WORLD? To the nobles who live in Benden Weyr, Lessa is nothing but a ragged kitchen girl. For most of her life she has survived by serving those who betrayed her father and took over his lands. Now the time has come for Lessa to shed her disguise—and take back her stolen birthright. But everything changes when she meets a queen dragon. The bond they share will be deep and last forever... moreHOW CAN ONE GIRL SAVE AN ENTIRE WORLD? To the nobles who live in Benden Weyr, Lessa is nothing but a ragged kitchen girl. For most of her life she has survived by serving those who betrayed her father and took over his lands. Now the time has come for Lessa to shed her disguise—and take back her stolen birthright. But everything changes when she meets a queen dragon. The bond they share will be deep and last forever. It will protect them when, for the first time in centuries, Lessa’s world is threatened by Thread, an evil substance that falls like rain and destroys everything it touches. Dragons and their Riders once protected the planet from Thread, but there are very few of them left these days. Now brave Lessa must risk her life, and the life of her beloved dragon, to save her beautiful world. . . . less

Another Turn, and the deadly silver Threads began falling again. So the bold dragonriders took to the air once more and their magnificent flying dragons swirled and swooped, belching flames that destroyed the shimmering strands before they reach the ground. But F'lar knew he had to find a better way to protect his beloved Pern, and he had to find it before the rebellious Oldtimers could breed anymore dissent. . moreAnother Turn, and the deadly silver Threads began falling again. So the bold dragonriders took to the air once more and their magnificent flying dragons swirled and swooped, belching flames that destroyed the shimmering strands before they reach the ground. But F'lar knew he had to find a better way to protect his beloved Pern, and he had to find it before the rebellious Oldtimers could breed anymore dissent. .. before his brother F'nor would be foolhardy enough to launch another suicide mission. .. and before those dratted fire-lizards could stir up any more trouble! less

The third volume in a series of adventures in the land of Pern.