H.G. Wells' late nineteenth-century novel in which an intellectually superior race from Mars invades Earth with plans to take over the planet.

In order to develop a secure defense against a hostile alien race's next attack, government agencies breed child geniuses and train them as soldiers. A brilliant young boy, Andrew "Ender" Wiggin lives with his kind but distant parents, his sadistic brother Peter, and the person he loves more than anyone else, his sister Valentine. Peter and Valentine were candidates for the soldier-training program but didn't make the cut―young Ender is the Wiggin...

When humanity reaches the stars, it discovers that it must defend its claim to new planets against alien races with similar expansionist tendencies. To ensure the expertise of its soldiers, Earth creates the Colonial Defense Force, an army of men and women otherwise classified as senior citizens, who give up their lives on Earth for an uncertain and perilous future among the stars. Scalzi's first novel presents a new approach to military sf, boasting...

Ender Wiggin, the young military genius, discovers that a second alien war is inevitable and that he must dismiss his fears to make peace with humanity's strange new brothers. "Three thousand planet-bound years have fled since Edgar Wiggin won Earth's war with the Formics by totally destroying them. Ender remains young, traveling constantly at relativistic speeds. In three thousand years, the Hive Queen and the Hegemon have become holy writ, and...

The Overlords appeared suddenly over every city - intellectually, technologically, and militarily superior to humankind. Benevolent, they made few demands: unify earth, eliminate poverty, and end war. With little rebellion, humankind agreed, and a golden age began." "But at what cost? With the advent of peace, man ceases to strive for creative greatness, and a malaise settles over the human race. To those who resist, it becomes evident that the Overlords...

"The Laconian Empire has fallen, setting the thirteen hundred solar systems free from the rule of Winston Duarte. But the ancient enemy that killed the gate builders is awake, and the war against our universe has begun again. In the dead system of Adro, Elvi Okoye leads a desperate scientific mission to understand what the gate builders were and what destroyed them, even if it means compromising herself and the half-alien children who bear the weight...

Residents of a small college town fall prey to a variety of unusual symptoms after picking up and being stung by unusual black rocks, and even as others rush to find a cure, the afflicted begin turning into aliens intent on building a space ship.

As galactic empires collide in battle and elemental beings destroy entire planetary systems, various factions of humanity wage war on each other in an ultimate stand for survival.

Due to humankind's destruction of most hydrogues, the remaining gas-planet inhabitants join forces with Kilikiss robots and plan to attack Earth, where leader Basil Wenceslas is facing his own battles against defiant soldiers, Hansa colonists, gypsy Roamers, and Therons of Thorac.

"When the space station Heimdall is invaded, Hannah and Nik must work together to defeat the enemy"--