Darkest Knight (Star Wars: Young Jedi Knights, Book 5)

Jacen and Jaina Solo and their Wookiee companion Lowbacca travel to the Wookiee homeworld of Kashyyyk where Lowie's younger sister Sirrakuk is about to undergo a Wookiee ritual. Since the ritual is dangerous, Lowie wants to assist his sister, Sirra. However, the Dark Jedi Zekk has been assigned to lead a raid on the Wookiee city of Thikkiiana, a major exporter of computer technology. By executing this mission, he will fulfill his great potential and win the title of the Darkest Knight of the Second Imperium. However, he must face his former friends Jacen and Jaina Solo in the process.