Young Jedi Knights: The Emperor's Plague is a young-adult novel from the Star Wars Legends continuity, penned by both Kevin J. Anderson and Rebecca Moesta. As the eleventh installment in the Star Wars: Young Jedi Knights series, it initially saw publication via Berkley Boulevard back in January of 1998.
This novel was later included as part of the collection Young Jedi Knights: The Fall of the Diversity Alliance which was released in 1998.
Jacen and Jaina
At the fall of the Galactic Empire, they were born—a fresh beacon of hope for the New Republic. Han Solo and Princess Leia's youthful twins have embarked on their Jedi Knight journey, successfully thwarting the sinister schemes of the Shadow Academy's forces. Now, alongside their comrades Tenel Ka and Lowbacca the Wookiee, these budding heroes of an already legendary saga press onward with their training.
The secret of Bornan Thul has been revealed: he has been safeguarding a lethal plague with the potential to wreak havoc across the galaxy if unleashed. And the villainous Nolaa Tarkona—chief of the Diversity Alliance—is aware of its hidden location.
Now, Jacen, Jaina, and their fellow Jedi are in a race against the clock. As a massive conflict erupts between New Republic troops and the forces of the Diversity Alliance, the young Jedi Knights must locate and neutralize the plague before it can be unleashed.
But first, they must confront Nolaa Tarkona. And her exceptionally dangerous hired gun, Boba Fett.
The Diversity Alliance uncovers the whereabouts of the storage facility for the Emperor's plague storehouse. Inside this facility, there are vast quantities of both biological and chemical weapons, designed to target various species. However, attempting to impede their progress are the young Jedi apprentices Jacen, Jaina, Raynar Thul together with their associates.
The Jedi must locate and obliterate the plague depot before the Diversity Alliance manages to deploy the plagues. Nevertheless, they are also compelled to confront Nolaa Tarkona, the leader of the Diversity Alliance, along with her most lethal operative Ailyn Vel, who is disguised as the notorious Boba Fett.