Recommendations based on "Challenge of the Unknown (Perry Rhodan #32)"

From the New York Times bestselling author of the Expanse comes a spectacular new space opera that sees humanity fighting for its survival in a war as old as the universe itself.★ “Masterful . . . . This is space opera at its best.” – Publishers Weekly (starred review)"The start of something truly epic." ― Fonda Lee, author of Jade City How humanity came to the planet called Anjiin is lost in the fog of history, but that history is about to end.The Carryx – part empire, part hive – have waged wars of conquest for centuries, destroying or enslaving species across the galaxy. Now, they are facing a great and deathless enemy. The key to their survival may rest with the humans of Anjiin.Caught up in academic intrigue and affairs of the heart, Dafyd Alkhor is pleased just to be an assistant to a brilliant scientist and his celebrated research team. Then the Carryx ships descend, decimating the human population and taking the best and brightest of Anjiin society away to serve on the Carryx homeworld, and Dafyd is swept along with them.They are dropped in the middle of a struggle they barely understand, set in a competition against the other captive species with extinction as the price of failure. Only Dafyd and a handful of his companions see past the Darwinian contest to the deeper game that they must play to survive: learning to understand – and manipulate – the Carryx themselves.With a noble but suicidal human rebellion on one hand and strange and murderous enemies on the other, the team pays a terrible price to become the trusted servants of their new rulers.Dafyd Alkhor is a simple man swept up in events that are beyond his control and more vast than his imagination. He will become the champion of humanity and its betrayer, the most hated man in history and the guardian of his people.This is where his story begins."Corey is always one of the most engaging voices in the genre." ― Adrian Tchaikovsky, author of Children of Time"A bang up read. I want more." ― Paolo Bacigalupi, author of The Water Knife"A powerful, provocative masterpiece that I will be thinking about for a very long time." ― Ryka Aoki, author of Light from Uncommon Stars

Thirteen hundred gates have opened to solar systems around the galaxy. But as humanity builds its interstellar empire in the alien ruins, the mysteries and threats grow deeper.In the dead systems where gates lead to stranger things than alien planets, Elvi Okoye begins a desperate search to discover the nature of a genocide that happened before the first human beings existed, and to find weapons to fight a war against forces at the edge of the imaginable. But the price of that knowledge may be higher than she can pay.At the heart of the empire, Teresa Duarte prepares to take on the burden of her father's godlike ambition. The sociopathic scientist Paolo Cortázar and the Mephistophelian prisoner James Holden are only two of the dangers in a palace thick with intrigue, but Teresa has a mind of her own and secrets even her father the emperor doesn't guess.And throughout the wide human empire, the scattered crew of the Rocinante fights a brave rear-guard action against Duarte's authoritarian regime. Memory of the old order falls away, and a future under Laconia's eternal rule -- and with it, a battle that humanity can only lose - seems more and more certain. Because against the terrors that lie between worlds, courage and ambition will not be enough...

In this thrilling, action-packed fourth installment in the Planetside series from acclaimed science fiction author Michael Mammay, retired Colonel Carl Butler gears up for another military investigation, full of danger, corporate intrigue, and tech people would kill for—perfect for fans of John Scalzi and Craig Alanson.  Colonel Butler has paid his dues and just wants to enjoy his retirement on a remote planet. But the galaxy has had other plans.  He has been roped into searching for a politician’s missing son and an industry magnate’s missing daughter. He has been kidnapped, violated numerous laws, and caused the destruction of colonial facilities. He’s famous—or infamous, depending on who you ask—praised and reviled in equal measure across the galaxy for his exploits. And he is determined to never let the government drag him into another investigation. But when a runaway twelve-year-old girl whose father has gone missing asks him for help, well…it’s a lot harder to say no. The girl’s father, Jorge Ramiro, was supposed to have been on Taug, a moon orbiting the gas giant Ridia 5, working on a dig with a famous archaeologist. But now there’s no sign of him and no record of him being there. Mining operations on the moon are run by two different consortiums, Caliber and Omicron—both of which have tried to kill Butler in the past. Butler doesn’t believe in coincidence. Landing on Taug with his right-hand man Mac, computer genius Ganos, and an elite security squad, Butler soon finds that they’ve charged back into the crosshairs—because Ramiro is not the only who has disappeared, and the perpetual darkside of this moon is hiding more than the truth about a missing archeologist…

National Bestseller! Return to the sprawling, Hugo Award-winning universe of the Galactic Commons to explore another corner of the cosmos—one often mentioned, but not yet explored—in this absorbing entry in the Wayfarers series, which blends heart-warming characters and imaginative adventure. With no water, no air, and no native life, the planet Gora is unremarkable. The only thing it has going for it is a chance proximity to more popular worlds, making it a decent stopover for ships traveling between the wormholes that keep the Galactic Commons connected. If deep space is a highway, Gora is just your average truck stop. At the Five-Hop One-Stop, long-haul spacers can stretch their legs (if they have legs, that is), and get fuel, transit permits, and assorted supplies. The Five-Hop is run by an enterprising alien and her sometimes helpful child, who work hard to provide a little piece of home to everyone passing through. When a freak technological failure halts all traffic to and from Gora, three strangers—all different species with different aims—are thrown together at the Five-Hop. Grounded, with nothing to do but wait, the trio—an exiled artist with an appointment to keep, a cargo runner at a personal crossroads, and a mysterious individual doing her best to help those on the fringes—are compelled to confront where they’ve been, where they might go, and what they are, or could be, to each other.

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. A true golden age is within our grasp. But now something has gone catastrophically wrong. On a primitive colony planet a renegade criminal's chance encounter with an utterly alien entity unleashes the most primal of all our fears. An extinct race, which inhabited the galaxy aeons ago called it "The Reality Dysfunction". It is the nightmare, which has prowled beside us since the beginning of history. "Absolute vintage science-fiction. Hamilton puts British sci-fi back into interstellar overdrive" - "The Times".

"An immense achievement, an impeccably crafted book without a single word out of place." —The New York TimesFrom bestselling author M. R. Carey comes a brilliant genre-defying story of humanity's expansion across millions of dimensions—and the AI technology that might see it all come to an end.INFINITY IS ONLY THE BEGINNING.The Pandominion: a political and trading alliance of a million worlds. Except that they’re really just one world, Earth, in many different realities. And when an A.I. threat arises that could destroy everything the Pandominion has built, they’ll eradicate it by whatever means necessary.Scientist Hadiz Tambuwal is looking for a solution to her own Earth’s environmental collapse when she stumbles across the secret of inter-dimensional travel, a secret that could save everyone on her dying planet. It leads her into the middle of a war on a scale she never dreamed of. And she needs to choose a side before every reality pays the price.“A fascinating window onto a dangerous and multifaceted universe.” —Adrian Tchaikovsky, author of Children of Time"A genuine treat for SF fans: an epic multiverse tale that moves like a thriller." —Kirkus (starred review)"Readers will be wowed." —Publishers Weekly (starred review)"Infinity Gate, with its in-depth science and rich characterization, is a must-read." —Booklist (starred review)

Meg Murry O'Keefe and her family are just sitting down to Thanksgiving dinner when her father gets a phone call from the White House about a madman's threat of nuclear war. Only an old Irish rune seems to hold a clue to averting worldwide disaster, and and when Meg's brother Charles Wallace, now fifteen, recites it, a radiant white beast--the unicorn Gaudior--appears to join him on his quest. But there are only twenty-four hours in which to stop tragedy from occurring. Can Charles Wallace, with the help of Gaudior and Meg, possibly succeed?

When George finds a way to escape the spacecraft Artemis, where he has been trapped, he is overjoyed. Surely now he can return to Earth. But when George touches down, he knows immediately that something is wrong. There's a barren wasteland where his home town used to be, intelligent robots roam the streets, and no one will talk to George about the Earth that he used to know. With the help of an unexpected new friend, can George find out what - or who - is behind this terrible new world, before it's too late?

In this thrilling entry in the renowned Robot series, interplanetary detective Elijah Baley embarks on a mind-stretching journey after the universe’s most advanced robot is found murdered.Detective Elijah Baiey is called to the Spacer world Aurora to solve a bizarre case of roboticide. The prime suspect is a gifted roboticist who had the means, the motive, and the opportunity to commit the crime. There’s only one catch: Baley and his positronic partner, R. Daneel Olivaw, must prove the man innocent. For in a case of political intrigue and love between woman and robot gone tragically wrong, there’s more at stake than simple justice. This time Baley’s career, his life, and Earth’s right to pioneer the Galaxy lie in the delicate balance.Isaac Asimov’s Robot series chronicles the sometimes uneasy partnership between human and humanoid:I, ROBOT • THE CAVES OF STEEL • THE NAKED SUN • THE ROBOTS OF DAWN

David Brin's Uplift novels are among the most thrilling and extraordinary science fiction ever written. Sundiver, Startide Rising, and The Uplift War--a New York Times bestseller--together make up one of the most beloved sagas of all time. Brin's tales are set in a future universe in which no species can reach sentience without being "uplifted" by a patron race. But the greatest mystery of all remains unsolved: who uplifted humankind? As galactic armadas clash in quest of the ancient fleet of the Progenitors, a brutal alien race seizes the dying planet of Garth. The various uplifted inhabitants of Garth must battle their overlords or face ultimate extinction. At stake is the existence of Terran society and Earth, and the fate of the entire Five Galaxies. Sweeping, brilliantly crafted, inventive and dramatic, The Uplift War is an unforgettable story of adventure and wonder from one of today's science fiction greats.