The New Rebellion

The New Rebellion is a novel by Kristine Kathryn Rusch.

Publisher's Synopsis
Somewhere in the galaxy, millions suddenly perish - a disruption of the Force so shocking it is felt by Luke at his Jedi academy and by Leia on Coruscant. While Leia must deal with an assasination attempt, a rumored plot against the New Republic, and allegations that Han Solo is involved, Luke seeks out a former Jedi student who may hold the key to the mass destruction. But Brakiss is only the bait in a deadly trap set by a master of the dark side who is determined to rule as emperor. He's targeted Luke, Leia, and Leia's Jedi children to die. Then billions will follow, in a holocaust unequaled in galactic history.