Empire. The twins do so, and he blasts off, vowing to destroy the Praxeum before reporting back to the Empire. Han Solo and Chewbacca arrive at the Praxeum in the Millennium Falcon. Shortly before taking off with Lowbacca to save the twins, Han allows Tenel Ka and Em Teedee to board the Falcon. Once they are airborne, they notice a TIE fighter making a beeline for the Praxeum. Qorl tries to fire his laser cannons, but it turns out that the twins didn't restore them to good working order. The Falcon chases him as he flies out of the atmosphere and escapes, using the hyperdrive that Jaina had installed on the TIE fighter. Once the TIE fighter has made the jump to hyperspace, Han, Chewbacca, Lowie and Tenel Ka head for the crash site, finding that despite looking the worse for wear, Jacen and Jaina seem to be fine. A few days later the Falcon carries the damaged skyhopper back to the Praxeum. Lowie and Jaina immediately begin work on the airspeeder. The four Jedi trainees contemplate whether Qorl made it back to the Empire... Book 2: Shadow Academy Jacen and Jaina are kidnapped by Imperial commandos and whisked off to a hidden station where are imprisoned in the "Shadow Academy" by a Dark Jedi. The book begins with Lando Calrissian, Han's old buddy, inviting the young Jedi Knights to visit his GemDiver station, a mining facility orbiting the gas planet Yavin. All the Jedi agree to go to GemDiver station, except for Tenel Ka, who stays at the academy because her grandmother is coming to visit, and she does not want her friends to know that she is a princess on her homeworld of Hapes. Meanwhile, at GemDiver, the twins go fishing for Corusca gems, indestructible jewels that can cut through the toughest armor. All are unsuccessful except for Jacen, who snags a small Corusca gem which he hides in his shoe. Suddenly, the GemDiver station is attacked by an unknown assailant, and Lowie and the twins are kidnapped. When they wake up, they learn they are on the cloaked space station called the Shadow Academy, a place for training Dark Jedi. They are soon introduced to the Dark Master Brakiss and his second in command, the beautiful Nightsister Tamith Kai of Dathomir. For the next weeks they put the young Jedi through vigorous and sometimes deadly training exercises,