Ace Double SF. Flipside was Telepower by Lee Hoffman

No one would have believed in the last years of the nineteenth century that this world was being watched keenly and closely by intelligences greater than man's and yet as mortal as his own; that as men busied themselves about their various concerns they were scrutinised and studied, perhaps almost as narrowly as a man with a microscope might scrutinise the transient creatures that swarm and multiply in a drop of water. With infinite complacency men went to and fro over this globe about their little affairs, serene in their assurance of their empire over matter. It is possible that the infusoria under the microscope do the same. No one gave a thought to the older worlds of space as sources of human danger, or thought of them only to dismiss the idea of life upon them as impossible or improbable. It is curious to recall some of the mental habits of those departed days. At most terrestrial men fancied there might be other men upon Mars, perhaps inferior to themselves and ready to welcome a missionary enterprise. Yet across the gulf of space, minds that are to our minds as ours are to those of the beasts that perish, intellects vast and cool and unsympathetic, regarded this earth with envious eyes, and slowly and surely drew their plans against us. And early in the twentieth century came the great disillusionment.

After hijacking a balloon from a Confederate camp, a band of five northern prisoners escapes the American Civil War. Seven thousand miles later, they drop from the clouds onto an uncharted volcanic island in the Pacific. Through teamwork, scientific knowledge, engineering, and perseverance, they endeavour to build a colony from scratch. But this island of abundant resources has its secrets. The castaways discover they are not alone. A shadowy, yet familiar, agent of their unfathomable fate is watching. What unfolds in Jules Verne’s imaginative marvel is both an enthralling mystery and the ultimate in survivalist adventures.

When an unidentified “monster” threatens international shipping, French oceanographer Pierre Aronnax and his unflappable assistant Conseil join an expedition organized by the US Navy to hunt down and destroy the menace. After months of fruitless searching, they finally grapple with their quarry, but Aronnax, Conseil, and the brash Canadian harpooner Ned Land are thrown overboard in the attack, only to find that the “monster” is actually a futuristic submarine, the Nautilus, commanded by a shadowy, mystical, preternaturally imposing man who calls himself Captain Nemo. Thus begins a journey of 20,000 leagues—nearly 50,000 miles—that will take Captain Nemo, his crew, and these three adventurers on a journey of discovery through undersea forests, coral graveyards, miles-deep trenches, and even the sunken ruins of Atlantis. Jules Verne’s novel of undersea exploration has been captivating readers ever since its first publication in 1870, and Frederick Paul Walter’s reader-friendly, scientifically meticulous translation of this visionary science fiction classic is complete and unabridged down to the smallest substantive detail.

An adventurous geology professor chances upon a manuscript in which a 16th-century explorer claims to have found a route to the earth's core. Professor Lidenbrock can't resist the opportunity to investigate, and with his nephew Axel, he sets off across Iceland in the company of Hans Bjelke, a native guide. The expedition descends into an extinct volcano toward a sunless sea, where they encounter a subterranean world of luminous rocks, antediluvian forests, and fantastic marine life — a living past that holds the secrets to the origins of human existence.

One night in the reform club, Phileas Fogg bets his companions that he can travel across the globe in just eighty days. Breaking the well-established routine of his daily life, he immediately sets off for Dover with his astonished valet Passepartout. Passing through exotic lands and dangerous locations, they seize whatever transportation is at hand—whether train or elephant—overcoming set-backs and always racing against the clock.

A comet rushes toward the earth, a deadly, glowing orb that soon fills the sky and promises doom. But mankind is too busy hating, stealing, scheming, and killing to care. As luminous green trails of cosmic dust and vapor stream across the heavens, blood flows beneath: nations wage all-out war, bitter strikes erupt, and jealous lovers plot revenge and murder. The earth slips past the comet by the narrowest of margins, but all succumb to the gases in its tail. When mankind wakes up, everyone is completely and profoundly different. An ill-fated romance between Willie Leadford and Nettie Stuart unfolds in a world buried in misery and bent on its own destruction. After the earth passes through the comet's tail, suffering, pettiness, and injustice melt away. Willie, Nettie, and everyone around them are reborn. They now see themselves and their world in a dramatically new and wonderful way.

The historians can’t seem to settle whether to call this one "The Third Space War" (or the fourth), or whether "The First Interstellar War" fits it better. We just call it “The Bug War." Everything up to then and still later were "incidents," "patrols," or "police actions." However, you are just as dead if you buy the farm in an "incident" as you are if you buy it in a declared war... In one of Robert A. Heinlein’s most controversial bestsellers, a recruit of the future goes through the toughest boot camp in the Universe—and into battle with the Terran Mobile Infantry against mankind’s most alarming enemy.

Frank Herbert's Final Novel in the Magnificent Dune Chronicles--the Bestselling Science Fiction Adventure of All Time. The desert planet Arrakis, called Dune, has been destroyed. The remnants of the Old Empire have been consumed by the violent matriarchal cult known as the Honored Matres. Only one faction remains a viable threat to their total conquest--the Bene Gesserit, heirs to Dune's power. Under the leadership of Mother Superior Darwi Odrade, the Bene Gesserit have colonized a green world on the planet Chapterhouse and are turning it into a desert, mile by scorched mile. And once they've mastered breeding sandworms, the Sisterhood will control the production of the greatest commodity in the known galaxy--the spice melange. But their true weapon remains a man who has lived countless lifetimes--a man who served under the God Emperor Paul Muad'Dib....

Book three in Frank Herbert's magnificent Dune Chronicles--one of the most significant sagas in the history of literary science fiction. The Children of Dune are twin siblings Leto and Ghanima Atreides, whose father, the Emperor Paul Muad'Dib, disappeared in the desert wastelands of Arrakis nine years ago. Like their father, the twins possess supernormal abilities--making them valuable to their manipulative aunt Alia, who rules the Empire in the name of House Atreides. Facing treason and rebellion on two fronts, Alia's rule is not absolute. The displaced House Corrino is plotting to regain the throne while the fanatical Fremen are being provoked into open revolt by the enigmatic figure known only as The Preacher. Alia believes that by obtaining the secrets of the twins' prophetic visions, she can maintain control over her dynasty. But Leto and Ghanima have their own plans for their visions--and their destinies.... Includes an introduction by Brian Herbert

The Lottery, one of the most terrifying stories written in this century, created a sensation when it was first published in The New Yorker. "Power and haunting," and "nights of unrest" were typical reader responses. This collection, the only one to appear during Shirley Jackson's lifetime, unites "The Lottery:" with twenty-four equally unusual stories. Together they demonstrate Jackson's remarkable range--from the hilarious to the truly horrible--and power as a storyteller.

Shirley Jackson’s beloved gothic tale of a peculiar girl named Merricat and her family’s dark secret Taking readers deep into a labyrinth of dark neurosis, We Have Always Lived in the Castle is a deliciously unsettling novel about a perverse, isolated, and possibly murderous family and the struggle that ensues when a cousin arrives at their estate. This edition features a new introduction by Jonathan Lethem.

Suffused with rich satire, chaotic brilliance, verbal turbulence and wild humor, The Crying of Lot 49 opens as Oedipa Maas discovers that she has been made executrix of a former lover's estate. The performance of her duties sets her on a strange trail of detection, in which bizarre characters crowd in to help or confuse her. But gradually, death, drugs, madness, and marriage combine to leave Oedipa in isolation on the threshold of revelation, awaiting the Crying of Lot 49.