Star Wars: Young Jedi Knights 13: Trouble on Cloud City

Jacen and Jaina
When the Empire died, they were born—a new hope for the New Republic. The young twins of Han Solo and Princess Leia have grown strong with the Force, thwarting the evil Nolaa Tarkona and destroying the Emperor's Plague. Now, with their friends Lowbacca the Wookiee and Tenel Ka, the future heroes of an already legendary saga continue their training.
Lando Calrissian offers the young Jedi Knights a rare opportunity—a vacation on Cloud City. They jump at the chance—as long as their new friend, the mysterious Anja Gallandro, can come along.
Anja is happy to be included. But little do the twins know that they are actually helping Anja hatch her sinister plan. A plan that goes far deeper than simple revenge…