Star Wars: Shadow of the Sith

Luke Skywalker and Lando Calrissian return in this essential novel set between Return of the Jedi and The Force Awakens. The Empire is dead. Nearly two decades after the Battle of Endor, the tattered remnants of Palpatine's forces have fled to the farthest reaches of the galaxy. But for the heroes of the New Republic, danger and loss are ever-present companions, even in this newly forged era of peace.
Jedi Master Luke Skywalker is haunted by visions of the dark side, foretelling an ominous secret growing somewhere in the depths of space, on a dead world called Exegol. The disturbance in the Force is undeniable .