BBY/ABY is used to position items along the Star Wars Timeline. BBY refers to Before the Battle of Yavin. ABY refers to After the Battle of Yavin. The Battle of Yavin in Episode IV: A New Hope occured in 0 BBY/ABY.
The New Republic is already on the brink of collapse with Grand Admiral Thrawn’s plight to re-conquer the galaxy, but its problems are far from over. A traitor has found its way into the highest level of its leadership at the same time as Luke Skywalker has been lured away by the promises of the long-forgotten, unstable Jedi Jorus C’baoth. Just as things seem as dark as they can get, Han and Lando learn that Thrawn is on the brink of making a discovery that could bring an end to the New Republic altogether.
The second installment of the Thrawn trilogy manages to raise the stakes even higher than the first. Timothy Zahn—like Grand Admiral Thrawn himself—is in top form in this novel.
The dying Empire's most cunning and ruthless warlord - Grand Admiral Thrawn - has taken command of the remnants of the Imperial fleet and launched a massive campaign aimed at the New Republic's destruction. With the aid of unimaginable weapons long hidden away by the Emperor on a backwater planet, Thrawn plans to turn the tide of battle, overwhelm the New Republic, and impose his iron rule throughout the galaxy.
Meanwhile, Han and Lando Calrissian race against time to find proof of treason inside the highest Republican Council - only to discover instead a ghostly fleet of warships that could bring doom to their friends and victory to their enemies.
Yet most dangerous of all is a new Dark Jedi, risen from the ashes of a shrouded past, consumed by bitterness...and scheming to corrupt Luke Skywalker to the Dark Side.