Unga Jedi Knights: Shadow Academy
Karaktären som du tänker på är Jacen Solo.
Från Wookiepedia:
While on a tour of Lando Calrissian's GemDiver Station, Jacen, Jaina, Lowbacca, and Em Teedee are caught in the middle of an Imperial raid and kidnapped. After being informed of what happened by Lando, Luke Skywalker embarks upon a rescue mission in search of the missing Jedi trainees. Feeling guilty because she was not with her friends and therefore could not help them, Tenel Ka accompanies him.
Och det finns naturligtvis ett "Shadow Academy":
Meanwhile, aboard an assault shuttle that figured prominently in the attack on GemDiver Station, the twins and Lowbacca meet Tamith Kai, the woman who led the attack. The students learn from her that their destination is the "Shadow Academy" where they will be trained to use the dark side of the Force in the service of the Second Imperium. Once they arrive at their destination, Brakiss, one of Luke's former students and the headmaster of the Shadow Academy greets them and reiterates most of what Tamith Kai told them. Jacen, Jaina and Lowbacca are then confined to their own separate cells.