From Goodreads:

In Dhalgren, perhaps one of the most profound and bestselling science fiction novels of all time, Samuel R. Delany has produced a novel "to stand with the best American fiction of the 1970s" (Jonathan Lethem).

Bellona is a city at the dead center of the United States. Something has happened there…. The population has fled. Madmen and criminals wander the streets. Strange portents appear in the cloud-covered sky. And into this disaster zone comes a young man–poet, lover, and adventurer–known only as the Kid. Tackling questions of race, gender, and sexuality, Dhalgren is a literary marvel and groundbreaking work of American magical realism.

From Goodreads:

Six days ago, astronaut Mark Watney became one of the first people to walk on Mars. Now, he's sure he'll be the first person to die there. After a dust storm nearly kills him & forces his crew to evacuate while thinking him dead, Mark finds himself stranded & completely alone with no way to even signal Earth that he’s alive—& even if he could get word out, his supplies would be gone long before a rescue could arrive. Chances are, though, he won't have time to starve to death. The damaged machinery, unforgiving environment or plain-old "human error" are much more likely to kill him first. But Mark isn't ready to give up yet. Drawing on his ingenuity, his engineering skills—& a relentless, dogged refusal to quit—he steadfastly confronts one seemingly insurmountable obstacle after the next. Will his resourcefulness be enough to overcome the impossible odds against him?

From Amazon:

Once a brilliant First-in Scout, Val Con yos'Phelium was "recruited" by the mysterious Liaden Department of Interior and brainwashed into an Agent of Change—a ruthless covert operative who kills without remorse.

Fleeing the scene of his latest murderous mission, he finds himself saving the life of ex-mercenary Miri Robertson, a tough Terran on the run from a team of interplanetary assassins. Thrown together by circumstances, Val Con and Miri struggle to elude their enemies and stay alive without slaying each other—or surrendering to the unexpected passion that flares between them.

From Goodreads:

If you ain’t scared, you ain’t human.

When Thomas wakes up in the lift, the only thing he can remember is his name. He’s surrounded by strangers—boys whose memories are also gone.

Nice to meet ya, shank. Welcome to the Glade.

Outside the towering stone walls that surround the Glade is a limitless, ever-changing maze. It’s the only way out—and no one’s ever made it through alive.

Everything is going to change.

Then a girl arrives. The first girl ever. And the message she delivers is terrifying.

Remember. Survive. Run.

FREEDOM OF INFORMATION

If you ask, she must answer. A steerswoman's knowledge is shared with any who request it; no steerswoman may refuse a question, and no steerswoman may answer with anything but the truth.

And if she asks, you must answer. It is the other side of tradition's contract -- and if you refuse the question, or lie, no steerswoman will ever again answer even your most casual question.

And so, the steerswomen — always seeking, always investigating — have gathered more and more knowledge about the world they traveled, and they share that knowledge freely.

Until the day that the steerswoman Rowan begins asking innocent questions about one small, lovely, inexplicable object…

Her discoveries grow stranger and deeper, and more dangerous, until suddenly she finds she must flee or fight for her life. Or worse -- lie.

Because one kind of knowledge has always been denied the the steerswomen:

Magic.

“If you haven’t read Kirstein’s Steerswoman books I envy you the chance to read them now for the first time.... I think they have a very good claim to be my favorite thing still being written. […] If you like science, and if you like watching someone work out mysteries, and if you like detailed weird alien worlds and human cultures, if really good prose appeals... you’re really in luck.” — Jo Walton, Hugo and Nebula Awards winner, author of Among Others and Farthing.

"[Kirstein] walks the tightrope between fantasy and science fiction with precision and grace... [her] compassion for even minor characters is evident on every page, and her prose is measured and alluring without being overworked." -- Damien Broderick & Paul Di Filippo, in Science Fiction: The 101 Best Novels 1985-2010

From Goodreads:

In Dhalgren, perhaps one of the most profound and bestselling science fiction novels of all time, Samuel R. Delany has produced a novel "to stand with the best American fiction of the 1970s" (Jonathan Lethem).

Bellona is a city at the dead center of the United States. Something has happened there…. The population has fled. Madmen and criminals wander the streets. Strange portents appear in the cloud-covered sky. And into this disaster zone comes a young man–poet, lover, and adventurer–known only as the Kid. Tackling questions of race, gender, and sexuality, Dhalgren is a literary marvel and groundbreaking work of American magical realism.

From Wikipedia:

Rendezvous with Rama is a hard science fiction novel by Arthur C. Clarke first published in 1972. Set in the 22nd century, the story involves a 50-kilometre (31 mi) cylindrical alien starship that enters Earth's solar system. The story is told from the point of view of a group of human explorers who intercept the ship in an attempt to unlock its mysteries. This novel won both the Hugo and Nebula awards upon its release, and is regarded as one of the cornerstones in Clarke's bibliography.

From John D. MacDonald, one of the enduring American novelists of the twentieth century, comes a science fiction classic with a timeless premise. An aimless young man discovers a way to stop the world in its tracks—and that’s when his life truly begins.

From John D. MacDonald, one of the enduring American novelists of the twentieth century, comes a science fiction classic with a timeless premise. An aimless young man discovers a way to stop the world in its tracks—and that’s when his life truly begins.

Introduction by Dean Koontz

Once an ordinary math teacher, Omar Krepps developed a knack for gambling, amassed a fabulous fortune, and spent the rest of his life traveling the world and giving away his millions. Upon his death, however, Krepps bequeaths nothing to his nephew and only living blood relative, Kirby Winter—nothing, that is, except an antique watch and a sealed letter to be opened after one year.

But Kirby has much more in his possession than he realizes. The watch has the power to manipulate time. Not only does this revelation shed light on the mystery of his uncle’s life, it puts Kirby on the path to unimaginable wealth and a new lease on love . . . as well as a whole host of deadly troubles. Even in a universe where time is no issue, Kirby must tread carefully to stay one step ahead of danger.

From Goodreads:

Six days ago, astronaut Mark Watney became one of the first people to walk on Mars. Now, he's sure he'll be the first person to die there. After a dust storm nearly kills him & forces his crew to evacuate while thinking him dead, Mark finds himself stranded & completely alone with no way to even signal Earth that he’s alive—& even if he could get word out, his supplies would be gone long before a rescue could arrive. Chances are, though, he won't have time to starve to death. The damaged machinery, unforgiving environment or plain-old "human error" are much more likely to kill him first. But Mark isn't ready to give up yet. Drawing on his ingenuity, his engineering skills—& a relentless, dogged refusal to quit—he steadfastly confronts one seemingly insurmountable obstacle after the next. Will his resourcefulness be enough to overcome the impossible odds against him?

From Amazon:

"Enoch Wallace survived the carnage of Gettysburg and lived through the rest of the Civil War to make it home to his parents' farm in south-west Wisconsin. But his mother was already dead and his father soon joined her in the tiny family cemetery.

"It was then that Enoch met the being he called Ulysses and the farm became a way station for space travellers. Now, nearly a hundred years later, the US government is taking an interest in the seemingly immortal Enoch, and the Galactic Council, which set up the way station is threatening to tear itself apart.

"Winner of the Hugo Award for best novel, 1964."