Earth is no longer alone—and it has learned the terrifying truth too late. As news spreads that an alien civilization is on its way to invade, humanity unites in preparation for a war that will not arrive for centuries. Yet the enemy has already found a way to cripple Earth’s defenses, placing...

When Genly Ai, an envoy from a vast interstellar alliance known as the Ekumen, arrives on the icy planet of Gethen, his mission is simple in theory: persuade its nations to join a wider community of worlds. But Gethen is unlike any place he has known. Its inhabitants are ambisexual, taking on male...

An enormous cylindrical object has entered Earth’s solar system on a collision course with the sun. A team of astronauts are sent to explore the mysterious craft, which the denizens of the solar system name Rama. What they find is astonishing evidence of a civilization far more advanced than ours....

Raised by Martians on Mars, Valentine Michael Smith is a human who has never seen another member of his species. Sent to Earth, he is a stranger who must learn what it is to be a man. But his own beliefs and his powers far exceed the limits of humankind, and as he teaches them about grokking and...

Amid the turmoil of China’s Cultural Revolution, a young physicist named Ye Wenjie makes a decision that will echo across decades—and beyond the boundaries of Earth itself. Years later, a series of strange and unsettling events begins to trouble the scientific community: experiments yield impossible...

Enoch Wallace is not like other humans. Living a secluded life in the backwoods of Wisconsin, he carries a nineteenth-century rifle and never seems to age—a fact that has recently caught the attention of prying government eyes. The truth is, Enoch is the last surviving veteran of the American Civil...