The Renegades of Pern by Anne McCaffrey

Follows the rise of a dangerous gang of outcasts and criminals led by the vengeful Lady Thella, who prey on Pern's Holds during a harsh Threadfall, focusing on young trader Jayge Lilcamp's quest for revenge after they destroy his family, and Aramina, a girl with a special dragon-link Thella seeks, leading to conflict across the planet and uncovering more of Pern's history. It's a concurrent story to the original trilogy, revealing events from different perspectives as Thella's violence escalates, threatening the fragile balance of Pern's society and its dragonriders' efforts.