Once, Dan Randolph was one of the richest men on Earth. Now the planet is spiraling into environmental disaster, with floods and earthquakes destroying the lives of millions. Martin Humphries, fabulously wealthy heir of the Humphries Trust, also knows that space-based industry is the way of the future. But unlike Randolph, he does not care if Earth perishes in the process.

A hero without peer or scruples, Sam Gunn has a nose for trouble, money, and women, though not necessarily in that order. A man with the ego (and stature) of a Napoleon, the business acumen of a P. T. Barnum, and the raging hormones of a teenage boy, Sam is the finest astronaut NASA ever trained and dumped. But more than money, more than women, Sam Gunn loves justice—and he really does love money and women.

Here are tales of star-faring adventure, peril, and drama. Here are journeys into the mind-bending landscapes of virtual worlds and alternate realities. Here you'll also find stories of humanity's astounding future on Earth, on Mars, and in the solar system beyond - stories that always get the science right. And Bova's gathering of deeply realized, totally human characters are the heroic, brave, tricky, sometimes dastardly engineers, astronauts, corporate magnates, politicians, and scientists who will make these futures possible.

Jon Ryan is irreverent, cocky, funny, and walks with a swagger. The cocky fighter pilot turned astronaut is also Earth's only chance for survival. The planet Jupiter, thrown off orbit, will destroy Earth in less than a century. Jon volunteers for the most ambitious, desperate mission ever conceived: His consciousness must be transferred into an experimental android host, where he'll live an immortal - and lonely - life. Jon's only companion on his 50-year voyage is his ship's irritable AI.

In a startling future that's coming closer every year, Chet Kinsman is an astronaut ace who has done everything one can in space - including commit the first murder. It's a secret he can never escape, not even on the moon, where he's head of the first U.S. lunar colony. A series of shocking yet strangely inevitable circumstances will force Kinsman to confront his hidden past and decide Earth's destiny. In a desperate countdown to nuclear annihilation, Kinsman will struggle against a deadly dilemma: if he rescues the world, he risks destroying himself.

NASA finally made it. The very first human has just set foot on the surface of our neighbor planet. This is the start of a long research expedition that sent four scientists into space. But the four astronauts of the NASA crew are not the only ones with this destination. The privately financed "Mars for Everyone" initiative has also targeted the Red Planet. Twenty men and women have been selected to live there and establish the first extraterrestrial settlement.

We were fighting on the wrong side of a war we couldn't win. And that was the good news. The Ruhar hit us on Columbus Day. There we were, innocently drifting along the cosmos on our little blue marble, like the native Americans in 1492. Over the horizon come ships of a technologically advanced, aggressive culture, and BAM! There go the good old days, when humans only got killed by each other. So, Columbus Day. It fits. When the morning sky twinkled again, this time with Kristang starships jumping in to hammer the Ruhar, we thought we were saved.

When Van Tudor returns to his childhood home, he inherits more than the family farm. His grandfather used to tell him fantastic stories of spacemen and monsters, princesses and galactic knights. Little did Van realize, the old man's tales were more than fiction; they were real. Hidden beneath the old barn, Van’s legacy is waiting: a starship, not of this world. With his combat AI, an android bird named Perry, Van takes his first steps into the wider galaxy. He soon finds that space is far busier and more dangerous than he could have ever conceived.

In the 25th century, humans have conquered space. The advent of faster-than-light travel has opened up hundreds of habitable planets for colonization, and humans have exploited the virtually limitless space and resources for hundreds of years with impunity. So complacent have they become with the overabundance that armed conflict is a thing of the past, and their machines of war are obsolete and decrepit. What would happen if they were suddenly threatened by a terrifying new enemy?

What lies on the dark side of the moon could change the course of humanity forever. When a Chinese rover discovers an alien technology on the dark side of the moon, it is up to Richard "Rock" Crandon and his NASA team of scientists and engineers to devise a way to return before the Chinese and Russians. Forced to deal with bureaucratic oversight and a complex team of personalities, Rock Crandon pushes his team to their limits.

Out of the blue, a young Space Fleet officer's dream becomes reality: He's made captain of a starship. Just in time for the return of humanity's most terrible enemy, after 50 years of peace. To survive against this enemy, Captain Tad Thatcher will have to do more than learn how to become an effective commander, or how to wrangle his wayward crew. He will need to reinvent space combat. From scratch.

Mourning the death of his father and gravely injured at the hands of the English, Jamie Fraser finds himself running with a band of mercenaries in the French countryside, where he reconnects with his old friend, Ian Murray. Both are nursing wounds, both have good reason to stay out of Scotland, and both are still virgins despite several opportunities to remedy that deplorable situation with ladies of easy virtue.

Jon Ryan was supposed to be dead. He wanted to be dead. But Jon wakes up in the far future with an alien burrowing in his chest for salvage. Someone was going to pay for this. Check that. Lots of people were going to pay for this. Jon was the first astronaut to download to an android host to find the population of doomed Earth a new home. But that was so long time ago. He is now literally lost in time.

Colonial Union Ambassador Ode Abumwe and her team are used to life on the lower end of the diplomatic ladder. But when a high-profile diplomat goes missing, Abumwe and her team are last minute replacements on a mission critical to the Colonial Union’s future. As the team works to pull off their task, CDF Lieutenant Harry Wilson discovers there’s more to the story of the missing diplomats than anyone expected... a secret that could spell war for humanity.

There's a reason We Are Legion was named Audible's Best Science Fiction Book of 2016: Its irresistibly irreverent wit! Bob Johansson has just sold his software company for a small fortune and is looking forward to a life of leisure. The first item on his to-do list: Spending his newfound windfall. On an urge to splurge, he signs up to have his head cryogenically preserved in case of death. Then he gets himself killed crossing the street. Waking up 117 years later, Bob discovers his mind has been uploaded into a sentient space probe with the ability to replicate itself.

The Tantalus 13 survey expedition went off the rails as soon as Mary Ketch and the crew of the Diamelen learned that the thing beneath their feet wasn’t a planet. An impossibly vast and ancient artificial structure lies below, hidden from the universe under a façade of cratered stone. SCARAB arrived on Tantalus 13 two years ago. An artificially intelligent, self-constructing factory, it was supposed to aid the crew in their mission, to meet their every need.

When humanity reaches for the stars, our probes are destroyed. They crash into an incredibly advanced piece of technology: a massive force-field. Unknown beings have placed a barrier around our star and planets, enclosing us within. We’re locked inside a Great Sphere. Was this invisible obstacle built to imprison us - or to protect us? No one knows the truth, but it soon becomes clear the barrier has leaks. Aliens infiltrate and try to sabotage our efforts to escape our cage.

The year is AD 2790. With space elevators and giant orbital fleets hovering over Earth, open war looks inevitable, and people are anxious to get away. The lines are drawn, with the Confederacy in the East and the First World Alliance in the West. In hopes of finding a refuge from the looming war, the Alliance is sending Captain Alexander de Leon to explore an Earth-type planet, code-named Wonderland, but at the last minute before launch, a Confederate fleet leaves orbit on a trajectory that threatens both the mission and Alliance sovereignty.

One of the few survivors of a League sneak attack on his poor and miserable homeworld of Carescria, Wilf Brim sets out to settle the score. Were it not for the attrition from the war that followed, Wilf would never have escaped his lower-class status and been accepted into the Academy. Now, freshly graduated, young Sublieutenant Wilf Ansor Brim, Imperial Fleet, begins his first assignment, Helmsman of the I.F.S. Truculent.

Death awaits the curious! Out along the rim of the galaxy hangs a loose configuration of some 60 stars known as the Faustian Chain. This whorl of sparkling suns is rich in planets and occupies an irregular volume of space some 20 light years in diameter. From an external viewpoint, the Chain presents a colorful display of plasma-streams, luminous nebulae and sparkling pinpoints of light.

Roger Torraway watched in horror as the monster lurched, toppled over and died. Project Man Plus had gone suddenly and drastically wrong. The race to colonize Mars was too important, too costly, and America was already too committed, for plans to be scrapped. They would have to make a new Martian. And Roger Torraway was it, candidate for the endless surgery, operation after painful operation, that would enable him to survive on that faraway planet.

Fleet of Worlds takes a closer look at Human-Puppeteer (Citizen) relations and the events leading up to Niven's first Ringworld novel. Kirsten Quinn-Kovacks is among the best and brightest of her people. She gratefully serves the gentle race that rescued her ancestors from a dying starship, gave them a world, and nurtures them still. If only the Citizens knew where Kirsten's people came from.

In AD 2600, the human race is finally beginning to realize its full potential. Hundreds of colonized planets scattered across the galaxy host a multitude of prosperous and wildly diverse cultures. Genetic engineering has pushed evolution far beyond nature's boundaries, defeating disease and producing extraordinary spaceborn creatures. Huge fleets of sentient trader starships thrive on the wealth created by the industrialization of entire star systems, and throughout inhabited space the Confederation Navy keeps the peace.

In this New York Times Notable Book of the Year, a strange new life form threatens all of humanity, and only a fool would stand in its way. Katmer Al Shei has done well with the starship Pasadena, cutting corners where necessary to keep her crew paid and her journeys profitable. But there are two things she will never skimp on: her crew - and her fool. For a long space journey, a certified Fool’s Guild clown is essential, to amuse, excite, and otherwise distract the crew from the drudgeries of interstellar flight.

Beneath the roiling surface of Betelgeuse, scientists anxiously await the one man essential to the success of Starmuse, the greatest engineering project in human history. But on Kantano’s World, Willard Ruskin battles invisible agents for control of his life, his physical form, and even his memories. Drawn into a conflict from which not even death will free him, Ruskin must find a way to reach Betelgeuse before his enemies sabotage Starmuse—and humanity’s future among the stars. A harrowing journey from inside the human cell... to the mind of a dying star.

Geoff and his friends live in Phocaea, a distant asteroid colony on the Solar System's frontier. They're your basic high-spirited young adults, enjoying such pastimes as hacking matter compilers to produce dancing skeletons that prance through the low-gee communal areas, using their rocket-bikes to salvage methane ice shrapnel that flies away when the colony brings in a big (and vital) rock of the stuff, and figuring out how to avoid the ubiquitous surveillance motes.

The U.S.S. Merrimack was the finest battleship class spaceship in Earth's fleet, able to stand up against the best the Palatine Empire could throw at them, even able to attack and kill swarms of the seemingly unstoppable Hive. But nothing could have prepared the captain and crew of the Merrimack to face the Myriad - three colonized worlds in the midst of a globular cluster that the Hive had somehow overlooked.

Emanuel Goldsmith, a famous poet, murdered eight people, then disappeared. Three people want to find him: an aspiring writer, an embittered scientist who wants to use him, and a policewoman who needs to put him in custody before the Selectors, a vigilante organization, get to him first.

They hunt us. They bomb our worlds for target practice. A star cluster in the constellation of Orion rotates once every 1,000 years. Those who rule there have an ancient tradition: When each cycle ends, they train their fleets by spilling the blood of lesser beings. The enemy fleets are coming again. In response, the Rebel Worlds gather their starships to face the terrifying threat, and this time humanity is asked to stand with them. The last time they considered Earth, Vikings in longboats were raiding English coastlines. Today, we're less primitive. Today, we're a target.

Rhoma Grace is a 16-year-old student from House Cancer with an unusual way of reading the stars. While her classmates use measurements to make accurate astrological predictions, she looks up at the night sky and makes up stories.