Rife with hostile cultures and outright enemies, the Unknown Regions hold many perils for Luke Skywalker and the Jedi, who are searching for Zonama Sekot - the living planet that may hold the key to dealing once and for all with the Yuuzhan Vong.

The troubles for the embattled living planet Zonama Sekot have just begun. As Luke Skywalker and Jacen Solo negotiate its place in the galactic struggle against the Yuuzhan Vong, one of its organic ships is taken by the alien invaders. Scientist Nen Yim is ordered to use the captive to find weak spots in Zonama Sekot's technology. But what Nen Yim discovers about the planet and its mysteries shocks her to the core.

The Galactic Alliance's hard-won success in countering the Yuuzhan Vong onslaught has proven all too brief, and the tide has turned once more to the invaders' advantage. Having overcome the sabotage strategies of the Jedi and their allies, the marauding aliens have pushed deeper into the galaxy and subjugated more worlds in their ruthless quest for domination.

From the ashes of the New Republic, torn to shreds by the savage Yuuzhan Vong forces, the newly formed Galactic Alliance has risen, determined to bring peace to the entire galaxy. But first the Yuuzhan Vong must be contained once and for all. And so Luke Skywalker seeks a world long lost to legend: Zonama Sekot, a sentient planet believed to have repelled an invasion by the Yuuzhan Vong decades ago. Deciphering the enigmatic secrets of Zonama Sekot just might turn the tides of a relentless war.

In the war against the ruthless Yuuzhan Vong, the fall of Coruscant leaves the New Republic divided by internal strife, and on the verge of bowing to conquest. But those who steadfastly refuse to consider surrender - Luke Skywalker, Han Solo, Leia Organa Solo, and their children and comrades-in-arms - are determined to seize victory against overwhelming odds.

Scattering after the Yuuzhan Vong's invasion of Coruscant, the panic-stricken members of the New Republic Advisory Council pause just long enough to set up a mock defense on nearby Borleias and attempt to buy time - which fools no one, least of all the Jedi. Bearing down swiftly on Borleias is a Yuuzhan Vong invasion fleet, determined to destroy the galaxy's remaining defenders.

Luke Skywalker's daring mission to halt the Yuuzhan Vong's nefarious plot to overthrow the New Republic is struggling on all fronts. And time is slipping away for Han and Leia Organa Solo, trapped on a small planet whose rulers are about to yield to Yuuzhan Vong pressure to give up the Jedi rebels.

With the enemy in hot pursuit, Jaina Solo is forced to seek haven in the unfriendly Hapes Cluster, where the Jedi are held responsible for a past tragedy - and where the royal family has grim plans for their famous Jedi guest. Even more sinister are the intentions of the Yuuvhan Vong, desperate to capture Jaina for a hideous sacrifice. Grief-stricken and obsessed with revenge, Jaina is blind to these threats and to the overpowering evil dangerously close to consuming her.

It is a solemn time for the New Republic, as the merciless Yuuzhan Vong continue their campaign of destruction. The brutal enemy has unleashed a savage creature capable of finding and killing Jedi Knights. And now Leia Organa Solo faces a terrible ultimatum. If the location of the secret Jedi base is not revealed within one week, the Yuuzhan Vong will blast millions of refugee ships into oblivion.

The brutal Yuuzhan Vong are scouring the universe for Jedi to slaughter. With no help from the divided New Republic, the Jedi stand alone against their seemingly invincible foe. Han and Leia Organa Solo risk deadly consequences with their controversial tactics to bolster the Jedi resistance. And after uncovering a new Yuuzhan Vong menace, Anakin and Tahiri find themselves wanted for murder by the Peace Brigade. To avoid capture, they jump into hyperspace - and into far graver trouble.

Han Solo and Leia Organa Solo work to help refugees flooding in to the planet Duro from the Rim worlds. However the dreaded Yuuzhan Vong have chosen Duro as their next target. Jacen Solo, working at his father's side, finds himself on the horns of a dilemma: how to reconcile using the Force as a tool for good, yet still fight the evil invaders. He must make the right choice, for the future of his family, and possibly of the New Republic itself, hangs in the balance.

Leia Organa Solo, estranged from her husband, Han, oversees the evacuation of refugees on planets in the path of the merciless Yuuzhan Vong. Luke Skywalker struggles to hold the fractious Jedi Knights together, even while one of them undertakes a bold but reckless undercover mission. And Han Solo stumbles into the dark heart of a raging battle.

Merciless attacks by an invincible alien force have left the New Republic reeling. Dozens of worlds have succumbed to occupation or annihilation, and even the Jedi Knights have tasted defeat. In these darkest of times, the noble Chewbacca is laid to rest, having died as heroically as he lived. A grief-stricken Han Solo is left to fit the pieces of his shattered soul back together before he loses everything: friends, family, and faith.

The alien Yuuzhan Vong have launched an attack on the worlds of the Outer Rim. They are merciless and they stand utterly outside the Force. Even the Jedi are rendered helpless by this impervious foe, and their solidarity has begun to unravel. While Luke struggles to keep the Jedi together, Knights Jacen Solo and Corran Horn set off on a reconnaissance mission to the planet Garqi. There they uncover a secret that might be used to undermine the enemy - if only they can stay alive long enough to use it!

It is a perilous time for the New Republic. Just when unity is needed most, mistrust is on the rise. Even the Jedi feel the strain, as rogue elements rebel against Luke's leadership. When alien invaders known as the Yunnan Vong strike without warning, the New Republic is thrown on the defensive. Merciless warriors, the Yunnan Vong glory in torture. Their technology is as strange as it is deadly. Most ominous of all, they are impervious to the Force.