Betrayal by Aaron Allston

This book starts something new by putting the heroes of the movies and of the New Jedi Order books at odds amongst themselves over the political unrest caused by the planet Corellia's rogue actions in relation to the Galactic Alliance. Families are split apart as Han and Leia and Wedge Antilles side with Corellia while pretty much everyone else sides with the GA. Jacen, always more of a theoretical thinker, starts exploring Sith traditions and the dark side of the Force. The title actually fits well as it describes several of the plots within the book. I'm looking forward to the rest of this series.