May the 4th be with you! It’s Star Wars day, and we’re celebrating with some of our favorite science fiction titles. Check out tales of empires in the stars, alien conflict, and more with this ebook sale—available today only for just $2.99 each.

The Collapsing Empire by John Sclazi

Our universe is ruled by physics. Faster than light travel is impossible—until the discovery of The Flow, an extradimensional field available at certain points in space-time, which can take us to other planets around other stars.

Riding The Flow, humanity spreads to innumerable other worlds. Earth is forgotten. A new empire arises, the Interdependency, based on the doctrine that no one human outpost can survive without the others. It’s a hedge against interstellar war—and, for the empire’s rulers, a system of control.

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The Dark Between the Stars by Kevin J. Anderson

Twenty years after the elemental conflict that nearly tore apart the cosmos in The Saga of Seven Suns, a new threat emerges from the darkness. The human race must set aside its own inner conflicts to rebuild their alliance with the Ildiran Empire for the survival of the galaxy.

In Kevin J. Anderson’s The Dark Between the Stars, galactic empires clash, elemental beings devastate whole planetary systems, and factions of humanity are pitted against each other. Heroes rise and enemies make their last stands in the climax of an epic tale seven years in the making.

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Dune: The Butlerian Jihad by Brian Herbert and Kevin J. Anderson

Throughout the Dune novels, Frank Herbert frequently referred to the long-ago war in which humans wrested their freedom from “thinking machines.” In Dune: The Butlerian Jihad, Brian Herbert and Kevin J. Anderson bring to life the story of that war, a tale previously seen only in tantalizing hints and clues. Finally, we see how Serena Butler’s passionate grief ignites the war that will liberate humans from their machine masters. We learn the circumstances of the betrayal that made mortal enemies of House Atreides and House Harkonnen; and we experience the Battle of Corrin that created a galactic empire that lasted until the reign of Emperor Shaddam IV.

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Earth Unaware by Orson Scott Card and Aaron Johnston

A hundred years before Ender’s Game, humans thought they were alone in the galaxy. Humanity was slowly making their way out from Earth to the planets and asteroids of the Solar System, exploring and mining and founding colonies.

The mining ship El Cavador is far out from Earth, in the deeps of the Kuiper Belt, beyond Pluto. Other mining ships, and the families that live on them, are few and far between this far out. So when El Cavador‘s telescopes pick up a fast-moving object coming in-system, it’s hard to know what to make of it. It’s massive and moving at a significant fraction of the speed of light.

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A Fire Upon the Deep by Vernor Vinge

Thousands of years in the future, humanity is no longer alone in a universe where a mind’s potential is determined by its location in space, from superintelligent entities in the Transcend, to the limited minds of the Unthinking Depths, where only simple creatures, and technology, can function. Nobody knows what strange force partitioned space into these “regions of thought,” but when the warring Straumli realm use an ancient Transcendent artifact as a weapon, they unwittingly unleash an awesome power that destroys thousands of worlds and enslaves all natural and artificial intelligence.

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Haze by L.E. Modesitt, Jr.

What lies beneath the millions of orbiting nanotech satellites that shroud the world called Haze? Major Keir Roget’s mission is to make planetfall in secret, find out, and report back to his superiors in the Federation, the Chinese-dominated government that rules Earth and the colonized planets.

For all his effectiveness as a security agent, Roget is troubled by memories of an earlier mission. When he was assigned to covert duty in the Noram backcountry town of St. George, he not only discovered that the long-standing Saint culture was neither as backward nor as harmless as his superiors believed, but he barely emerged with his life and sanity whole.

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Hellhole by Brian Herbert and Kevin J. Anderson

Only the most desperate colonists dare to make a new home on Hellhole. Reeling from a recent asteroid impact, tortured with horrific storms, tornadoes, hurricanes, earthquakes, and churning volcanic eruptions, the planet is a dumping ground for undesirables, misfits, and charlatans…but also a haven for dreamers and independent pioneers.

What no one knows is this: the planet Hellhole, though damaged and volatile, hides an amazing secret. Deep beneath its surface lies the remnants of an obliterated alien civilization and the buried memories of its unrecorded past that, when unearthed, could tear the galaxy apart.

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Jupiter by Ben Bova

Grant Archer only wanted to study astrophysics. But the forces of the “New Morality,” the coalition of censorious do-gooders who run 21st-century America, have other plans for him.

To his distress, Grant is torn from his young bride and sent to a research station in orbit around Jupiter, to spy on the scientists who work there. Their work may lead to the discovery of higher life forms in the Jovian system-with implications the New Morality doesn’t like at all.

Buy Jupiter: B&N Nook | eBooks.com | Google Play | iBooks | Kindle | Kobo

Off Armageddon Reef by David Weber

Humanity pushed its way to the stars – and encountered the Gbaba, a ruthless alien race that nearly wiped us out.

Earth and her colonies are now smoldering ruins, and the few survivors have fled to distant, Earth-like Safehold, to try to rebuild. But the Gbaba can detect the emissions of an industrial civilization, so the human rulers of Safehold have taken extraordinary measures: with mind control and hidden high technology, they’ve built a religion in which every Safeholdian believes, a religion designed to keep Safehold society medieval forever.

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*This offer ends May 4th.