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When Rod Walker decides to take the final test for "Deacon" Matson's interplanetary survival course, he knows he will be facing life-or-death situations on an unsettled planet. What he doesn't expect is that something will go wrong with the "Tunnel in the Sky" and he and his fellow students will not be able to return to Terra.

Matt Dodson arrives at Space Academy little prepared for the rigorous program he is about to enter. But that's the point of the academy: to take young men and steep them in a demanding tradition of honor, courage, and sacrifice until they have earned the right to join the Patrol as guardians of the solar peace.

Jim Marlowe's Martian pet, Willis, seems like nothing more than an adorable ball of fur.

But Jim's devotion to the little creature will soon lead him and his pal Frank into a death-defying trek across Mars.

On a snowy night, Cara and her grandmother are pursued into St. Christopher's church by an unknown man. Clutching her grandmother's mysterious amulet, and following the old woman's instructions, Cara escapes their pursuer and falls into Luster, the world of the unicorns.

In the center of Luster towers an enormous tree that is the Heart of the World. Now the tree is wounded, pierced by a tunnel that connects it to Earth. Through that tunnel strides Beloved, the ancient enemy of the unicorns, followed by an army of Hunters eager to destroy every last unicorn.

In the third volume of the Unicorn Chronicles, Cara Diana Hunter journeys to the Valley of the Centaurs in quest of a mysterious lost story that could hold the key to the survival of the unicorns.

Luster, the world where the unicorns fled to escape the Hunters who have sworn to wipe them out, has dangers of its own - as Cara discovers when she attempts to cross that world in a desperate effort to rescue her grandmother.

It's been two years since Enna was swept up in a heart-pounding court adventure. Now, having returned to her old life in the forests of Bayern, she is growing restless. When a strange force takes possession of her brother, Liefer, she returns to the capital to seek the help of her friend Isi, Bayern's princess. But Bayern is tottering on the verge of war with neighboring Tira.

Bayern has triumphed in its war with Tira. But though the war is over, simmering anger remains among the Tirans and new hostilities could erupt at any moment. In a desperate attempt to maintain the peace, King Geric sends an ambassador to the Tiran capitol. Of course, an ambassador needs a military guard.

Miri lives on a mountain where, for generations, her ancestors have quarried stone and lived a simple life. Then word comes that the king's priests have divined her small village the home of the future princess. In a year's time, the prince himself will come and choose his bride from among the girls of the village.

Princess Anidori-Kiladra of Kildenree was born with a word on her tongue, and a secret magic. Though she is raised in luxury, she is never quite comfortable with who she is, or what she is to become. Then she is sent on a journey to marry an unknown prince. The trip is difficult, and before it is finished all her expectations are overturned.

The behemoth is the fiercest creature in the British navy. It can swallow enemy battleships with one bite. The Darwinists will need it, now that they are at war with the Clanker powers.

The riveting conclusion to Scott Westerfeld's New York Times best-selling trilogy that's "sure to become a classic" (School Library Journal).

It is the cusp of World War I, and all the European powers are arming up. The Austro-Hungarians and Germans have their Clankers, steam-driven iron machines loaded with guns and ammunition. The British Darwinists employ fabricated animals as their weaponry. The Leviathan is a living airship, the most formidable airbeast in the skies of Europe.

Ever wonder who was the first kid to keep a wallet on a big chunky chain, or wear way-too-big pants on purpose? What about the mythical first guy who wore his baseball cap backwards? These are the Innovators, the people on the very cusp of cool. Seventeen-year-old Hunter Braque's job is finding them for the retail market.