Space Science

When asubatomic physics experiment causes a massive explosion, interdimensional gateways open in Florida - and aliens pour out. Some intend to bring Earth to its knees. Others seem willing to help, but will annihilate the planet if Navy SEAL Command Master Chief Robert Miller can't stop the menace from spreading.

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.

The Alliance has been fighting a losing battle against the Syndicate Worlds for over a century. Now, Captain John “Black Jack” Geary, who returned to the fleet after a hundred-year suspended animation, must keep the Alliance one step ahead of its merciless foe… After a series of deadly engagements, the Alliance fleet is severely damaged and its arsenal is running low. Forced to halt in the Baldur Star System to raid the Syndic mines for raw materials, Geary is anxious to get moving again.

This survival guide for new pilots identifies the pitfalls waiting inside the killing zone, the period from 50 to 350 flight hours when they leave their instructors behind and fly as pilot in command for the first time. Although they're privately certified, many of these unseasoned aviators are unaware of the potential accidents that lie ahead while trying to build decision-making skills on their own - many times falling victim to inexperience.

Warped Passages is an altogether exhilarating journey that tracks the arc of discovery from early 20th-century physics to the razor's edge of modern scientific theory. One of the world's leading theoretical physicists, Lisa Randall provides astonishing scientific possibilities that, until recently, were restricted to the realm of science fiction. Unraveling the twisted threads of the most current debates on relativity, quantum mechanics, and gravity, she explores some of the most fundamental questions posed by Nature.

With the galaxy thrown into chaos by mutual breaches of the Two Hundred Years' peace, what seemed like an isolated incident on the Thelicosa/Merida border has become an epidemic. In the midst of this chaos, the Thelicosan and Meridan fleets on their respective borders have come to a sort of tense peace after the events in Book II, but now it's clear: Somebody wants war. And it's not the Free Systems of the galaxy.

Authors Christopher Knight and Alan Butler realized that the ancient system of geometry they presented in their earlier breakthrough study works as perfectly for the Moon as it does the Earth. On further investigation, they found a consistent sequence of beautiful integer numbers when looking at every major aspect of the Moon - no such pattern emerges for any other planet or moon in the solar system. In addition, Knight and Butler discovered that the Moon possesses few or no heavy metals and has no core - something that should not be possible.

For two years, the Castle Federation and the Alliance of Free Stars have stood against Marshal James Walkingstick of the Terran Commonwealth and his mission of conquest. Battles have been won and lost, worlds have died, and soldiers like Admiral Kyle Roberts have been forged on the anvil of war. But the Alliance cannot win. The Commonwealth has more worlds, more ships, more soldiers. They claim their victory is inevitable. That history is on their side. Refusing to accept the Commonwealth's future, the Alliance embarks on a do-or-die mission to end the war in one strike.

How do you improve on the best guide for pilots to learn how to fly in all kinds of weather? The answer is the fifth edition of Weather Flying. Regarded as the bible of weather flying, this aviation classic not only continues to make complex weather concepts understandable for even the least experienced of flyers, but has now been updated to cover new advances in technology. At the same time, this respected text still retains many of its original insights from over four decades of publication, provided by renowned weather flying veteran Robert N. Buck.

The year is 3326. Nigel Sheldon, one of the founders of the Commonwealth, receives a visit from the Raiel - self-appointed guardians of the Void, the enigmatic construct at the core of the galaxy that threatens the existence of all that lives. The Raiel convince Nigel to participate in a desperate scheme to infiltrate the Void. Once inside, Nigel discovers that humans are not the only life-forms to have been sucked into the Void. The humans trapped there are afflicted by an alien species of biological mimics.

Countdown: At long last, an extraterrestrial civilization reached out and made the First Contact. The end of their message showed humankind how to access a mysterious game. But as people figure out this mysterious game, the countdown timer ticks away. And no one can say exactly what will happen when Earth's safety is no longer guaranteed.

For millennia, the planet Harmony has been protected by the Oversoul, an artificial intelligence programmed to prevent thoughts of war and conquest from threatening the fragile remnant of Earth's peoples. But as the Oversoul's systems have begun to fail, a great warrior has arisen to challenge its bans.

Wil Sietinen is driven by duty. Torn between his responsibilities as heir to a preeminent family dynasty while training to be an officer in the galactic military, he would rather design starships than plot political schemes or battle strategies. But when Wil is captured by a mysterious alien enemy, he learns that a brutal war has been secretly waging for centuries… and his unique telekinetic powers are the last hope to end the conflict.

The first interstellar war, a generation ago, left humanity enslaved. Now humans fight in the armies of their masters to save themselves from annihilation. At least, that's what the propaganda insists is true. What the layers of lies keep hidden is how badly the new war is going for the people of earth. Now it's Dylan Kane's turn to blast into the heavens and join the battle, but what his masters don't know is that by putting a weapon in his hands, they're giving him the key to unlocking his hopes of freedom.

At his death in 1988, Robert A. Heinlein left a legacy that almost single-handedly defined modern science fiction. But one of Heinlein's masterpieces was never finished. In 1955, he began work on Variable Star, a powerful and passionate tale of two young lovers driven apart by pride, power, and the vastness of interstellar time and space. Now, the Heinlein estate has authorized award-winning author Spider Robinson to expand his outline into a full-length novel. And the result is vintage Heinlein.

For nearly a billion years, every known sentient species in the universe has been the result of genetic and cultural guidance - or "uplifting" - by a previously uplifted patron race. Then humans are discovered. Having already uplifted chimps and dolphins, humanity clearly qualifies as an intelligent species, but did they actually evolve their own intelligence, or did some mysterious patron race begin the process, then suddenly abandon Earth?

New ER doctor Alexi Sur always intended to join an aid agency. She'd just expected to work among humans. When the Pax Galactica Corps becomes her only option (don't ask—the debts aren't hers, but the family is, much to her regret), Alexi finds herself traveling the galaxy and learning alien physiology and culture, all while becoming a reality TV star. Being pursued by camera drones and starring in her very own Welcome-to-the-Universe documentary was never on Alexi's to-do list.

Farmers are willing to trade with just about anyone, so long as they're nice and polite ... The embargo has been called off, and ships from the three major systems are now free to travel once more to Phaethon. This may or may not affect Tom's business resupplying spent power packs with his star farm. More important than that, it means the planet is drawing closer to the day an election will be held to decide which system Phaethon aligns with. And with no embargo, everyone is seeing a wide variety of newcomers for the first time. Some of these visitors are encouraging people to align with ...

Agreeing to accompany her father's people back to their homeworld, Kira Forrest prepares for the fight of her life. She's agreed to undertake the Trial of the Broken, a rite of passage every member of her father's House must pass. It offers a path to independence and freedom that is too tempting to deny. Not everyone welcomes this lost daughter of Roake. There are those who fear what her presence might bring to light. Betrayal stalks the halls of Kira's birthplace-its roots embedded deep in the events that claimed her parent's lives and set her on her current path.

Beryl Markham, the first person to fly solo across the Atlantic from east to west, describes her childhood on a farm in Kenya, her apprenticeship as a horse trainer, and her later career as a pioneer aviator who piloted passengers and supplies in a small plane to remote corners of Africa.