Assault at Selonia - Roger MacBride Allen

Imprisoned on the planet Corellia, Han Solo finds
himself at the mercy of his evil cousin, Thracken
Sal-Solo. Thracken plans to restore the Imperial
system and seize total power -- no matter what the
cost. Han has one chance to stop him. But to do so
he must turn his back on his human cousin and join
forces with a female alien. Dracmus was arrested
as a ringleader in a plot against the corrupt Human
League. Now she and Han will attempt a daring
escape to Selonia in time to warn Leia, Luke
Skywalker, and Lando of Thracken's plan. But can Han trust
the alien to keep her word?

Meanwhile,
other questions threaten the New Republic -- and the
lives of millions. Who is behind the deadly
Starbuster plot? Why is someone attempting to take
possession of Corellia's powerful planetary repulsors?
And what is the secret behind the mysterious
Centerpoint Station, and ancient, artificial world of
unknown origin that has suddenly -- and
inexplicably -- come alive?