19 books in series

Star Wars: The New Jedi Order

Star Wars: The New Jedi Order is a 22-book series with 19 released primary works first released in 1653 with contributions by R. A. Salvatore, Michael A. Stackpole, James Luceno, Kathy Tyers, Greg Keyes, Troy Denning, Elaine Cunningham, Aaron Allston, Matthew Woodring Stover, Walter Jon Williams, Sean Williams, and Shane Dix.

Vector Prime
Dark Tide I: Onslaught
Dark Tide II: Ruin
Agents of Chaos I: Hero's Trial
Agents of Chaos II: Jedi Eclipse
Balance Point
Emissary of the Void
Recovery
Edge of Victory I: Conquest
Edge of Victory II: Rebirth
Star by Star
Dark Journey
The Apprentice
Enemy Lines I: Rebel Dream
Enemy Lines II: Rebel Stand
Traitor
Destiny's Way
Ylesia
Force Heretic I: Remnant
Force Heretic II: Refugee
Force Heretic III: Reunion
The Final Prophecy
The Unifying Force