A history of the idea of "black holes" explores the tumultuous debate over the existence of this now well-accepted phenomenon, focusing particular attention on Indian scientist Subrahmanyan Chandrasekhar.

Baird, a fresh new voice in the tradition of Marion Zimmer Bradley, follows up "The Stone of the Stars" with this second installment of her Dragon Throne trilogy of adventure, magic, and mythic beasts.

“Action, adventure, betrayal, and poison add up to a winner." —Booklist New York Times–bestselling author Rae Carson makes a triumphant return to the world of her award-winning Girl of Fire and Thorns trilogy in this extraordinary stand-alone novel. Fans of Leigh Bardugo, Kendare Blake, and Tomi Adeyemi won’t want to put this book down. Red Sparkle Stone is a foundling orphan with an odd name, a veiled past, and a mark of magic in her hair. But finally—after years and years of running, of fighting—she is about to be adopted into the royal family by Empress Elisa herself. She’ll have a home, a family. Sixteen-year-old Red can hardly believe her luck. Then, in a stunning political masterstroke, the empress’s greatest rival blocks the adoption, and everything Red has worked for crumbles before her eyes. But Red is not about to let herself or the empress become a target again. Determined to prove her worth and protect her chosen family, she joins the Royal Guard, the world’s most elite fighting force. It’s no coincidence that someone wanted her to fail as a princess, though. Someone whose shadowy agenda puts everything—and everyone—she loves at risk. As danger closes in, it will be up to Red to save the empire. If she can survive recruitment year—something no woman has ever done before. New York Times–bestselling author Rae Carson returns to the world of The Girl of Fire and Thorns in this action-packed fantasy-adventure starring an iconic heroine who fights for her family and her friends, and for a place where she will belong.

The Alliance has toppled the tyrannical empire. It should be a time for celebration, but not for fighter pilot Captain Alisa Marchenko. After barely surviving a crash in the final battle for freedom, she's stranded on a dustball of a planet, billions of miles from her young daughter. She has no money or resources, and there are no transports heading to Perun, her former home and the last imperial stronghold. But she has a plan. Steal a dilapidated and malfunctioning freighter from a junkyard full of lawless savages. Slightly suicidal, but she believes she can do it. Her plan, however, does not account for the elite cyborg soldier squatting in the freighter, intending to use it for his own purposes. As an imperial soldier, he has no love for Alliance pilots. In fact, he's quite fond of killing them. Alisa has more problems than she can count, but she can't let cyborgs, savages, or ancient malfunctioning ships stand in her way. If she does, she’ll never see her daughter again. Fans of Firefly and Star Wars should enjoy this fun, fast-paced space opera series from USA Today best-selling author, Lindsay Buroker. If you like to wait and binge-read, the series is now complete at eight novels.

A "dazzling" tale of empire and betrayal set among the stars (#1 New York Times bestselling author Casey McQuiston), this queer, spectacular space opera draws inspiration from Roman and Egyptian empires—and the lives and loves of Cleopatra and Julius Caesar. Princess Altagracia has lost everything. After a bloody civil war, her twin sister has claimed both the crown of their planet, Szayet, and the Pearl of its prophecy: a computer that contains the immortal soul of Szayet’s god. So when the interstellar Empire of Ceiao turns its conquering eye toward Szayet, Gracia sees an opportunity. To regain her planet, Gracia places herself in the hands of the empire and its dangerous commander, Matheus Ceirran. But winning over Matheus, to say nothing of his mercurial and compelling captain Anita, is no easy feat. And in trying to secure her planet’s sovereignty and future, Gracia will find herself torn between Matheus’s ambitions, Anita’s unpredictable desires, and the demands of the Pearl that whispers in her ear. For Szayet’s sake and her own, she will need to become more than a princess with a silver tongue. She will have to become a queen as history has never seen before. "A glittering triumph of a book that weaves together history and tragedy into a star-spanning epic." —Everina Maxwell, author of Winter’s Orbit

New York Times best-selling series - Omnibus - March Upcountry and March to the Sea, Books 1 and 2 in the Empire of Man Series. Roger Ramius MacClintock was young, handsome, athletic, an excellent dresser, and third in line for the Throne of Man. It probably wasn't too surprising that someone in his position should react by becoming spoiled, self_centered, and petulant. After all, what else did he have to do with his life? Then warships of the Empire of Man's worst rivals shoot his crippled vessel out of space and Roger is shipwrecked on the planet Marduk, whose jungles are full of deadly predators and barbarian hordes with really bad dispositions. Now all Roger has to do is hike halfway around the entire planet, then capture a spaceport from the Bad Guys, somehow commandeer a starship, and then go home to Mother for explanations. Fortunately, Roger has an ace in the hole: Bravo Company of Bronze Battalion of The Empress' Own Regiment. If anyone can get him off Marduk alive, it's the Bronze Barbarians. At the publisher's request, this title is sold without DRM (Digital Rights Management). About The Empire of Man Series: _Will fascinate sophisticated readers (the manual of arms for a fourarmed, 10 foot soldier is a thing of beauty) . . . [and] grip straightforward action lovers.Ó ¾Publishers Weekly _Coauthors Weber and Ringo excel in depicting the lives and times of soldiers both on and off the battlefield.Ó ¾Library Journal.